1. Medicine (Level 2)
   1. First aid (Level 4)
      1. First aid kit
   2. Health care (Level 4)
2. Medical ethics (Level 4)
3. Medical device
4. Medical emergency
5. Medicalization
6. Emergency medical services (Level 4)
7. Healthcare industry
8. Search and rescue
9. Triage
10. White coat

This section contains 12 articles.

1. Health professional
2. Allied health professionals
3. Emergency medical technician
4. Nursing (Level 3)
   1. Midwifery
5. Paramedic
6. Pharmacist (Level 4)
7. Medical doctor (Level 4)
   1. General practitioner
8. Surgeon
9. Dentist
10. Veterinarian

This section contains 11 articles.

1. Health facility
2. Hospital (Level 3)
3. Clinic
4. Doctor's office
5. Emergency department (Level 4)
6. Intensive care unit
7. Operating theater
8. Pharmacy (Level 4)
9. Psychiatric hospital (Level 4)
10. Residential treatment center
11. Trauma center

This section contains 10 articles.

1. Medical procedure
2. Abortion (Level 3)
   1. Medical abortion
3. Anesthesia (Level 3)
   1. General anaesthesia
   2. Local anesthesia
4. Blood donation
5. End-of-life care
   1. Hospice
   2. Palliative care (Level 4)

This section contains 32 articles.

1. Medical diagnosis (Level 4)
2. Medical test (Level 4)
3. Physical examination (Level 4)
4. Screening (medicine)
5. Auscultation
   1. Heart sounds
   2. Respiratory sounds
6. Autopsy (Level 4)
7. Biopsy (Level 4)
8. Blood test (Level 4)
   1. Blood culture
   2. Complete blood count
   3. Comprehensive metabolic panel
   4. Glucose test
   5. Lipid profile
9. Diagnostic microbiology
10. Eye examination (Level 4)
11. Lumbar puncture (Level 4)
12. Palpation
13. Pap test (Level 4)
14. Percussion (medicine)
15. Reflex (Level 4)
16. Speculum (medicine)
17. Telehealth
18. Urine test
    1. Drug test
    2. Pregnancy test
19. Vital signs
    1. Blood pressure (Level 4)
    2. Human body temperature
    3. Pulse (Level 4)
    4. Respiratory rate

This section contains 43 articles.

1. Therapy (Level 4)
2. Blood transfusion (Level 4)
3. Cardiopulmonary resuscitation
4. Cauterization
5. Chemotherapy (Level 4)
6. Cure
7. Defibrillation
8. Hemodialysis
9. Massage
10. Mouth-to-mouth resuscitation
11. Occupational therapy
12. Oral rehydration therapy
13. Oxygen therapy
14. Phage therapy
15. Physical therapy (Level 4)
16. Radiation therapy (Level 4)
17. Reperfusion therapy
18. Symptomatic treatment (Level 4)
19. Tracheal intubation

This section contains 6 articles.

1. Crown (dental restoration)
2. Dental braces
3. Dental extraction
4. Dental implant
5. Dental restoration (Level 4)
6. Root canal treatment

This section contains 18 articles.

1. Surgery (Level 3)
2. Amputation (Level 4)
3. Angioplasty
4. Bariatric surgery
5. Caesarean section
6. Debridement
7. Hysterectomy
8. Incision and drainage
9. LASIK
10. Neurosurgery
11. Organ transplantation (Level 4)
    1. Heart transplantation
    2. Kidney transplantation
    3. Skin grafting
12. Plastic surgery (Level 4)
13. Reduction (orthopedic procedure)
14. Sterilization (medicine) (Level 4)
    1. Vasectomy

1. Human body (Level 3)
2. Human anatomy
   1. Cadaver
   2. Human variability
3. Blood type (Level 4)
   1. ABO blood group system
   2. Rh blood group system
4. Celiac plexus
5. Human head
   1. Scalp
   2. Human brain (Level 4)
   3. Forehead
   4. Brow ridge
   5. Face (Level 4)
      1. Human eye (Level 4)
      2. Human nose
   6. Facial skeleton
      1. Mandible
   7. Human mouth
      1. Human tooth (Level 4)
         1. Root canal (Level 4)
      2. Uvula
      3. Tonsil
   8. Chin
6. Human digestive system
   1. Gastrointestinal tract (Level 4)
7. Human hair color
8. Human musculoskeletal system
   1. Anterior cruciate ligament
   2. Human back
      1. Latissimus dorsi muscle
   3. Human skeleton (Level 4)
   4. Shoulder
      1. Deltoid muscle
   5. Pectoralis major
   6. Pelvic floor
   7. Rectus abdominis muscle
9. Human skin
   1. Human skin color
   2. Wrinkle
10. Human voice (Level 4)
11. Arm (Level 4)
    1. Biceps
    2. Forearm
    3. Hand (Level 4)
       1. Finger (Level 4)
          1. Thumb
          2. Index finger
          3. Middle finger
          4. Ring finger
          5. Little finger
       2. Handedness
    4. Triceps
12. Hip
    1. Gluteus maximus
13. Groin
14. Human reproductive system
    1. Female ejaculation
       1. G-spot
    2. Human penis
    3. Vulva
       1. Labia
15. Human anus
    1. Hemorrhoid
16. Human leg (Level 4)
    1. Calf (leg)
    2. Hamstring
    3. Thigh
    4. Foot (Level 4)
       1. Toe
17. Human microbiome

1. Medical specialty
2. Anesthesiology
3. Angiology (Level 4)
4. Audiology
5. Cardiology (Level 4)
6. Dentistry (Level 3)
   1. Orthodontics
7. Dermatology (Level 4)
8. Endocrinology
9. Emergency medicine
10. Family medicine
11. Gastroenterology (Level 4)
12. Geriatrics (Level 4)
13. Hematology (Level 4)
14. Hepatology
15. Immunology (Level 4)
16. Infectious diseases (medical specialty)
17. Internal medicine
    1. Acute medicine
18. Intensive care medicine
19. Life extension
    1. Senescence
    2. Supercentenarian
20. Medical genetics
21. Medical microbiology
22. Nephrology
23. Neurology (Level 4)
24. Nuclear medicine
25. Occupational medicine
26. Oncology (Level 4)
27. Ophthalmology (Level 4)
28. Optometry (Level 4)
29. Orthopedic surgery
30. Orthotics
31. Otorhinolaryngology (Level 4)
32. Pathology
33. Pediatrics (Level 4)
    1. Neonatology
34. Pharmacology (Level 4)
    1. Pharmacodynamics
    2. Pharmacokinetics (Level 4)
    3. Prescription drug (Level 4)
35. Podiatry
36. Psychiatry (Level 4)
    1. Clinical neuroscience
37. Pulmonology (Level 4)
38. Radiology (Level 4)
39. Reproductive medicine
    1. Andrology
    2. Obstetrics and gynaecology (Level 4)
       1. Obstetrics
       2. Gynaecology
    3. Sexual and reproductive health (Level 4)
40. Rheumatology
41. Sports medicine
42. Toxicology (Level 4)
43. Traumatology
44. Urology (Level 4)
45. Vaccination (Level 4)
46. Veterinary medicine (Level 4)

1. Public health (Level 4)
2. Epidemiology (Level 4)
3. Health education
4. Infant mortality
5. Life expectancy (Level 4)
6. Preventive healthcare (Level 4)
7. Quarantine
8. WASH

This section contains 8 articles.

1. Alternative medicine (Level 4)
2. Chiropractic
3. Herbal medicine (Level 4)
   1. Medicinal plants
4. Homeopathy
5. Naturopathy
6. Osteopathy
7. Quackery (Level 4)

This section contains 12 articles.

1. Traditional medicine (Level 4)
2. Ancient Egyptian medicine
3. Ancient Greek medicine
4. Ayurveda (Level 4)
5. Humorism
   1. Bloodletting
6. Medicine in the medieval Islamic world
7. Traditional Chinese medicine (Level 4)
   1. Acupuncture (Level 4)
   2. Chinese herbology
   3. Tui na
8. African traditional medicine

This section contains 16 articles.

1. Drug (Level 3)
2. Pharmacotherapy
3. Adverse effect
4. Drug class
   1. Anatomical Therapeutic Chemical Classification System
   2. Depressant
   3. Hallucinogen
   4. Sedative
   5. Stimulant (Level 4)
5. Drug interaction
6. Medication (Level 3)
7. Placebo (Level 4)
8. Psychoactive drug
9. Drug discovery
10. Side effect
11. WHO Model List of Essential Medicines

This section contains 11 articles.

1. Drug delivery
2. Dosage form
   1. Capsule (pharmacy)
   2. Inhaler
   3. Nebulizer
   4. Tablet (pharmacy)
3. Route of administration
   1. Injection (medicine)
      1. Intravenous therapy
   2. Oral administration
   3. Topical medication

This section contains 157 articles.

1. ACE inhibitor
2. Amphetamine (Level 4)
   1. Methamphetamine
3. Anabolic steroid
4. Anticoagulant
   1. Warfarin
5. Anticonvulsant
6. Antidote
7. Barbiturate
8. Bronchodilator
   1. Salmeterol
   2. Salbutamol
9. Caffeine (Level 4)
10. Calamine
11. Carbamazepine
12. Diabetes medication
    1. Metformin
13. Ephedrine
14. Epinephrine (medication)
15. Gabapentin
16. Heparin
17. Hormone replacement therapy
18. Hydrocortisone
19. Hypnotic
20. Insulin (medication)
21. Loperamide
22. Methylphenidate
23. Naloxone
24. Propranolol
25. Sildenafil
26. Statin
    1. Atorvastatin

This section contains 14 articles.

1. Anesthetic
2. General anaesthetic
   1. Atropine
   2. Halothane
   3. Isoflurane
   4. Ketamine
   5. Midazolam
   6. Nitrous oxide (medication)
   7. Propofol
3. Local anesthetic
   1. Benzocaine
   2. Bupivacaine
   3. Lidocaine
   4. Procaine

This section contains 6 articles.

1. Antihistamine
2. Cimetidine
3. Diphenhydramine
4. Hydroxyzine
5. Loratadine
6. Ranitidine

This section contains 32 articles.

1. Antimicrobial
2. Antimicrobial resistance
3. Antiseptic
   1. Alcohols (medicine)

This section contains 14 articles.

1. Antibiotic (Level 3)
2. Azithromycin
3. Cephalosporin
   1. Cefalexin
   2. Cefazolin
4. Erythromycin
5. Neomycin/polymyxin B/bacitracin
6. Penicillin (Level 4)
   1. Amoxicillin
   2. Ampicillin
7. Tetracycline antibiotics
   1. Doxycycline
   2. Tetracycline
   3. Tigecycline

This section contains 4 articles.

1. Antiviral drug
2. Aciclovir
3. Oseltamivir
4. Zidovudine

This section contains 3 articles.

1. Antifungal
2. Amphotericin B
3. Fluconazole

This section contains 7 articles.

1. Antiparasitic
2. Albendazole
3. Artemisinin
4. Chloroquine
5. Ivermectin
6. Nitazoxanide
7. Quinine (Level 4)

This section contains 14 articles.

1. Analgesic (Level 4)
2. Medical cannabis
3. Nonsteroidal anti-inflammatory drug
   1. Aspirin (Level 4)
   2. Ibuprofen
   3. Naproxen
4. Opioid
   1. Codeine
   2. Fentanyl
   3. Hydrocodone
   4. Methadone
   5. Morphine (Level 4)
   6. Oxycodone
5. Paracetamol

This section contains 18 articles.

1. Psychiatric medication
2. Antidepressant
   1. Amitriptyline
   2. Bupropion
   3. Clomipramine
   4. Selective serotonin reuptake inhibitor
   5. Fluoxetine
   6. Imipramine
   7. Sertraline
3. Anxiolytic
   1. Benzodiazepine (Level 4)
      1. Clonazepam
      2. Diazepam
4. Antipsychotic
   1. Chlorpromazine
   2. Fluphenazine
5. Mood stabilizer
   1. Lithium (medication)

This section contains 18 articles.

1. Vaccine (Level 3)
   1. Vaccine hesitancy (Level 4)
      1. Vaccines and autism
2. COVID-19 vaccine
3. DPT vaccine
4. Hepatitis B vaccine
5. HPV vaccine
6. Influenza vaccine
7. Malaria vaccine
8. Meningococcal vaccine
9. MMR vaccine
10. Pneumococcal vaccine
11. Polio vaccine (Level 4)
12. Rabies vaccine
13. Smallpox vaccine (Level 4)
14. Typhoid vaccine
15. Varicella vaccine
16. Yellow fever vaccine

This section contains 23 articles.

1. Recreational drug use (Level 4)
2. Alcohol (drug) (Level 4)
   1. Alcohol intoxication (Level 4)
3. Cannabis (drug) (Level 4)
4. Cocaine (Level 4)
5. Heroin
6. MDMA
7. Opium (Level 4)
8. Phencyclidine
9. Psychedelic drug
   1. LSD
   2. Mescaline
   3. Psilocybin
10. Smoking (Level 3)
    1. Cigar
    2. Cigarette (Level 4)
    3. Electronic cigarette
    4. Passive smoking
    5. Smoking cessation (Level 4)
    6. Smoking pipe
11. Tobacco (Level 4)
    1. Health effects of tobacco (Level 4)
    2. Nicotine (Level 4)

1. Disease (Level 2)
2. Acute (medicine)
3. Chronic condition
4. International Classification of Diseases

1. Abscess
2. Acne (Level 4)
3. Acromegaly
4. Allergy (Level 3)
   1. Allergen
   2. Allergic rhinitis
   3. Anaphylaxis
   4. Food allergy
5. Anemia (Level 4)
6. Appendicitis
7. Arthritis (Level 3)
   1. Rheumatoid arthritis
   2. Osteoarthritis
8. Arthropathy
9. Atrophy
10. Autoimmune disease (Level 4)
    1. Lupus
    2. Multiple sclerosis (Level 4)
    3. Psoriasis
    4. Vitiligo
11. Chronic pain
12. Cirrhosis (Level 4)
13. Dehydration
14. Dermatitis
    1. Atopic dermatitis
15. Diabetes (Level 3)
    1. Type 1 diabetes
    2. Type 2 diabetes
    3. Gestational diabetes
16. Diverticulitis
17. Dysmenorrhea
18. Ectopic pregnancy
19. Endometriosis
20. Epilepsy (Level 4)
21. Fibromyalgia
22. Fistula
23. Gallstone
24. Gout (Level 4)
25. Genetic disorder
    1. Cystic fibrosis
    2. Haemophilia
    3. Huntington's disease
    4. Sickle cell disease
26. Hyperthyroidism
27. Hypothyroidism
28. Immunodeficiency
29. Impacted wisdom teeth
30. Inflammatory bowel disease
    1. Crohn's disease
    2. Ulcerative colitis
31. Irritable bowel syndrome
32. Kidney failure
33. Kidney stone disease
34. Migraine (Level 4)
35. Motion sickness
36. Myalgic encephalomyelitis/chronic fatigue syndrome
37. Neurodegenerative disease
    1. Alzheimer's disease (Level 4)
    2. ALS
    3. Dementia (Level 4)
    4. Parkinson's disease (Level 4)
38. Osteoporosis
39. Peptic ulcer disease
40. Periodontal disease
    1. Gingivitis
41. Pleural effusion
42. Polycystic ovary syndrome
43. Respiratory disease
    1. Asthma (Level 3)
    2. Bronchitis (Level 4)
    3. Chronic obstructive pulmonary disease (Level 4)
       1. Emphysema
44. Sexual dysfunction
    1. Erectile dysfunction
45. Raynaud syndrome
46. SIDS
47. Starvation
48. Tension headache
49. Tooth decay (Level 4)

1. Cardiovascular disease (Level 3)
2. Aneurysm (Level 4)
3. Arrhythmia
   1. Atrial fibrillation
4. Arteriosclerosis
   1. Atherosclerosis
5. Congenital heart defect
6. Coronary artery disease
7. High cholesterol
8. Hypertension (Level 4)
9. Hypertensive heart disease
10. Hypotension
11. Myocardial infarction (Level 4)
12. Peripheral artery disease
13. Shock (circulatory) (Level 4)
    1. Cardiogenic shock
    2. Distributive shock
       1. Septic shock
    3. Hypovolemic shock
    4. Obstructive shock
14. Stroke (Level 3)
15. Thrombosis

This section contains 6 articles.

1. Injury (Level 3)
   1. Injury in humans
2. Major trauma (Level 4)
3. Polytrauma
4. Wound (Level 4)
5. Scar

This section contains 51 articles.

1. Abrasion (medicine)
2. Asphyxia
   1. Choking
   2. Drowning
3. Avulsion injury
4. Bleeding (Level 4)
   1. Internal bleeding
   2. Nosebleed
5. Blunt trauma (Level 4)
6. Bone fracture (Level 4)
   1. Hip fracture
   2. Mandibular fracture
   3. Nasal fracture
   4. Open fracture
   5. Skull fracture
7. Brain injury (Level 4)
   1. Concussion (Level 4)
   2. Chronic traumatic encephalopathy
8. Bruise (Level 4)
9. Burn (Level 4)
   1. Scalding
   2. Sunburn
10. Cardiac arrest (Level 4)
11. Dental trauma
    1. Dental avulsion
12. Disc herniation
    1. Sciatica
13. Frostbite (Level 4)
14. Heat illness
    1. Heat stroke
    2. Hyperthermia
15. Hernia
16. Hypothermia (Level 4)
17. Hypoxia (medicine) (Level 4)
    1. Perinatal asphyxia
18. Ingrown nail
19. Joint dislocation
20. Mouth ulcer
21. Penetrating trauma
    1. Gunshot wound
    2. Stab wound
22. Repetitive strain injury
    1. Carpal tunnel syndrome
23. Respiratory failure (Level 4)
24. Scoliosis
25. Self-harm
26. Splinter
27. Sprain
28. Strain (injury)
29. Tendinopathy
    1. Tennis elbow

This section contains 12 articles.

1. Toxic injury
2. Asbestosis
3. Drug overdose
4. Poison (Level 4)
   1. Carbon monoxide poisoning
   2. Lead poisoning
   3. Mercury poisoning
   4. Mushroom poisoning (Level 4)
5. Snakebite
6. Toxicity (Level 4)
7. Toxin
   1. Neurotoxin

This section contains 8 articles.

1. Physical disability (Level 3)
2. Birth defect
3. Dwarfism
4. Low back pain

This section contains 4 articles.

1. Bell's palsy
2. Cerebral palsy (Level 4)
3. Developmental coordination disorder
4. Paralysis

This section contains 13 articles.

1. Amusia
2. Hearing loss (Level 4)
   1. Deafness

This section contains 10 articles.

1. Visual impairment (Level 4)
2. Cataract
3. Color blindness (Level 4)
   1. Achromatopsia
4. Glaucoma
5. Refractive error
   1. Astigmatism
   2. Farsightedness
   3. Myopia
   4. Presbyopia

This section contains 12 articles.

1. Attention deficit hyperactivity disorder (Level 4)
2. Autism (Level 3)
3. Down syndrome (Level 4)
4. Fetal alcohol spectrum disorder
5. Intellectual disability (Level 3)
6. Learning disability
   1. Dyslexia (Level 4)
7. Speech–language pathology
   1. Aphasia
   2. Muteness
   3. Speech disorder
      1. Stuttering

1. Neoplasm (Level 4)
   1. Benign tumor
2. Cancer (Level 3)
   1. Metastasis
3. Brain tumor (Level 4)
   1. Medulloblastoma
4. Bone tumor
5. Carcinogen (Level 4)
6. Cervical cancer
7. Breast cancer (Level 4)
8. Colorectal cancer (Level 4)
9. Head and neck cancer
10. Leukemia (Level 4)
11. Liver cancer
12. Lung cancer (Level 4)
13. Lymphoma (Level 4)
    1. Hodgkin lymphoma
14. Mesothelioma
15. Multiple myeloma
16. Ovarian cancer
17. Pancreatic cancer
18. Penile cancer
19. Prostate cancer (Level 4)
20. Sarcoma
21. Skin cancer (Level 4)
    1. Melanoma (Level 4)
22. Stomach cancer
23. Testicular cancer

This section contains 16 articles.

1. Infection (Level 3)
   1. Opportunistic infection
2. Pathogen (Level 4)
   1. Fungal infection (Level 4)
   2. Parasitic disease
      1. Helminthiasis
   3. Pathogenic bacteria
   4. Prion (Level 4)
   5. Viral disease
3. Epidemic
   1. Pandemic
4. Germ theory of disease
5. Immunity (medicine)
   1. Immunization
   2. Inoculation
6. Neglected tropical diseases

This section contains 12 articles.

1. Pathogen transmission
2. Airborne transmission
3. Disease vector
4. Foodborne illness (Level 4)
5. Natural reservoir
6. Sexually transmitted infection (Level 3)
7. Waterborne disease
   1. Fecal–oral route
8. Zoonosis
   1. Mosquito-borne disease
   2. Tick-borne disease
   3. Reverse zoonosis

This section contains 16 articles.

1. Bloodstream infection
2. Conjunctivitis
3. Encephalitis (Level 4)
4. Gangrene (Level 4)
5. Gastroenteritis (Level 3)
   1. Dysentery (Level 4)
6. Hepatitis (Level 4)
7. Keratitis
8. Meningitis (Level 4)
9. Otitis externa
10. Otitis media
11. Pelvic inflammatory disease
12. Respiratory tract infection
    1. Pneumonia (Level 3)
13. Skin infection
14. Urinary tract infection

This section contains 27 articles.

1. Anthrax (Level 4)
2. Brucellosis
3. Botulism (Level 4)
4. Chlamydia (Level 4)
5. Cholera (Level 4)
6. Diphtheria (Level 4)
7. Erysipelas
8. Gonorrhea (Level 4)
9. Glanders
10. Impetigo
11. Legionnaires' disease
12. Leprosy (Level 4)
13. Leptospirosis
14. Lyme disease (Level 4)
15. Pathogenic Escherichia coli
16. Plague (disease)
    1. Bubonic plague (Level 4)
17. Streptococcal pharyngitis
    1. Rheumatic fever
18. Scarlet fever (Level 4)
19. Staphylococcal infection
20. Syphilis (Level 4)
21. Tetanus (Level 4)
22. Tuberculosis (Level 3)
23. Typhoid fever (Level 4)
24. Typhus (Level 4)
25. Whooping cough (Level 4)

This section contains 48 articles.

1. Chickenpox (Level 4)
   1. Shingles
2. Chikungunya
3. Classical swine fever
4. Common cold (Level 3)
5. COVID-19 (Level 4)
   1. Long COVID
6. Cowpox
7. Croup
8. Dengue fever (Level 4)
9. Ebola (Level 4)
10. Hand, foot, and mouth disease (Level 4)
11. Hepatitis A
12. Hepatitis B
13. Hepatitis C
14. Hepatitis D
15. Hepatitis E
16. Herpes (Level 4)
    1. Genital herpes
    2. Cold sore
    3. Herpes simplex encephalitis
    4. Herpes esophagitis
    5. Neonatal herpes
    6. Eczema herpeticum
    7. Herpes simplex keratitis
    8. Herpetic gingivostomatitis
    9. Herpetic whitlow
17. HIV/AIDS (Level 3)
18. Human papillomavirus infection (Level 4)
19. Infectious mononucleosis
20. Influenza (Level 3)
    1. Avian influenza
21. Japanese encephalitis
22. Measles (Level 4)
23. Mpox
24. Mumps (Level 4)
25. Nipah virus infection
26. Polio (Level 4)
27. Rabies (Level 4)
28. Rift Valley fever
29. Rinderpest
30. Rotavirus (Level 4)
31. Rubella
32. SARS
33. Smallpox (Level 3)
34. West Nile fever (Level 4)
35. Yellow fever (Level 4)
36. Zika fever

This section contains 4 articles.

1. Athlete's foot
2. Candidiasis
3. Dermatophytosis
4. Onychomycosis

This section contains 8 articles.

1. African trypanosomiasis
2. Amoebiasis
3. Chagas disease
4. Giardiasis
5. Leishmaniasis
6. Malaria (Level 3)
7. Primary amoebic meningoencephalitis
8. Toxoplasmosis

This section contains 12 articles.

1. Ascariasis
2. Cysticercosis
3. Dracunculiasis
4. Infestation
   1. Head lice infestation
   2. Myiasis
   3. Scabies (Level 4)
5. Lymphatic filariasis
6. Onchocerciasis
7. Schistosomiasis
8. Taeniasis
9. Toxocariasis

This section contains 4 articles.

1. Transmissible spongiform encephalopathy
   1. Bovine spongiform encephalopathy
   2. Creutzfeldt–Jakob disease
   3. Variant Creutzfeldt–Jakob disease

1. Mental disorder (Level 3)
   1. Developmental disorder
2. Dissociative disorder
   1. Dissociative identity disorder
   2. Dissociative amnesia
   3. Depersonalization-derealization disorder
3. Catatonia
4. Conduct disorder
5. Eating disorder (Level 4)
   1. Anorexia nervosa
   2. Bulimia nervosa
   3. Pica (disorder)
   4. Body image disturbance
6. Hoarding disorder
7. Kleptomania
8. Mass psychogenic illness
9. Obsessive–compulsive disorder
   1. Body dysmorphic disorder
10. Oppositional defiant disorder
11. Paranoia
12. Pedophilia (Level 4)
13. Pyromania
14. Schizophrenia (Level 4)
15. Somatic symptom disorder
16. Suicide crisis
    1. Suicide intervention
    2. Suicide methods
    3. Suicide prevention
17. Tourette syndrome

This section contains 12 articles.

1. Anxiety disorder (Level 4)
2. Phobia (Level 4)
   1. Acrophobia
   2. Agoraphobia
   3. Arachnophobia
   4. Claustrophobia
   5. Fear of flying
3. Post-traumatic stress disorder (Level 4)
4. Generalized anxiety disorder
5. Social anxiety disorder
6. Hypochondriasis
7. Complex post-traumatic stress disorder

This section contains 9 articles.

1. Mood disorder
2. Bipolar disorder (Level 4)
   1. Bipolar I disorder
   2. Bipolar II disorder
   3. Mania
3. Dysthymia
4. Major depressive disorder (Level 4)
5. Postpartum depression
6. Seasonal affective disorder

This section contains 13 articles.

1. Personality disorder (Level 4)
2. Antisocial personality disorder
3. Avoidant personality disorder
4. Borderline personality disorder
5. Dependent personality disorder
6. Depressive personality disorder
7. Histrionic personality disorder
8. Narcissistic personality disorder
9. Obsessive–compulsive personality disorder
10. Paranoid personality disorder
11. Psychopathy (Level 4)
12. Schizoid personality disorder
13. Schizotypal personality disorder

This section contains 8 articles.

1. Sleep disorder
2. Bruxism
3. Insomnia
4. Jet lag
5. Narcolepsy
6. Sleep apnea
7. Sleep paralysis
8. Sleepwalking

This section contains 3 articles.

1. Asperger syndrome
2. Hysteria
3. Neurosis (Level 4)

1. Signs and symptoms
2. Syndrome (Level 4)
3. Abdominal pain
4. Ageusia
   1. Dysgeusia
   2. Hypogeusia
5. Amenorrhea
6. Anosmia
   1. Hyposmia
7. Ataxia
8. Aura (symptom)
9. Blurred vision
10. Coma (Level 4)
    1. Vegetative state (Level 4)
11. Comedo
    1. Pimple
12. Constipation
13. Cough
14. Cramp
15. Cyanosis
16. Diarrhea (Level 4)
17. Dizziness
    1. Vertigo
    2. Lightheadedness
    3. Balance disorder
18. Fatigue
19. Fever
20. Goose bumps
21. Headache
22. Heartburn
23. Heart failure
24. Heart rate
    1. Bradycardia
    2. Tachycardia
25. Hives
26. Hypoesthesia
27. Inflammation (Level 4)
28. Itch
29. Jaundice
30. Myalgia
31. Myoclonus
    1. Hiccup
32. Nausea
33. Nevus
34. Phonophobia
35. Photophobia
36. Psychosis (Level 4)
    1. Delusion (Level 4)
    2. Hallucination (Level 4)
37. Rash
38. Rhinorrhea
    1. Post-nasal drip
39. Seizure
40. Sepsis
41. Shivering
42. Shortness of breath
43. Sleep deprivation
44. Sneeze
45. Sore throat
46. Syncope (medicine)
47. Tinnitus
48. Toothache (Level 4)
49. Vomiting
50. Wart

1. Health (Level 3)
   1. Mental health (Level 3)
   2. Men's health
   3. Women's health
2. Ageing (Level 3)
   1. Frailty syndrome
   2. Gerontology
3. Hair loss
   1. Alopecia areata
   2. Pattern hair loss
   3. Telogen effluvium
4. Breastfeeding (Level 4)
   1. Breast milk
   2. Extended breastfeeding
   3. Human–animal breastfeeding
   4. Wet nurse
5. Fertilisation (Level 4)
   1. Infertility (Level 4)
   2. In vitro fertilisation
6. Obesity (Level 3)
7. Occupational safety and health (Level 4)
   1. Hazard
   2. Personal protective equipment (Level 4)
8. Overweight
9. Psychological trauma
10. Quality of life
11. Activities of daily living
12. Substance use disorder (Level 4)
    1. Addiction (Level 3)
    2. Alcoholism (Level 4)
    3. Substance dependence (Level 4)
    4. Substance abuse
13. Stress (biology) (Level 4)
14. Underweight

1. Nutrition (Level 3)
2. Appetite
   1. Hunger (physiology)
3. Diet (nutrition) (Level 4)
4. Dietary supplement (Level 4)
5. Food group (Level 4)
6. Healthy diet
7. Human nutrition
8. Hunger (Level 4)
9. Lactose intolerance
10. Malnutrition (Level 4)
    1. Thiamine deficiency
    2. Pellagra
    3. Rickets
    4. Scurvy
    5. Stunted growth
11. Nutrient
    1. Mineral (nutrient)
    2. Vitamin (Level 4)

This section contains 16 articles.

1. Vitamin A
2. Vitamin C
3. Vitamin D
4. Vitamin E
5. Vitamin K
6. B vitamins
   1. Thiamine
   2. Riboflavin
   3. Vitamin B3
      1. Nicotinic acid
   4. Pantothenic acid
   5. Vitamin B6
      1. Pyridoxine
   6. Biotin
   7. Folate
   8. Vitamin B12

1. Physical fitness (Level 4)
2. Body mass index (Level 4)
3. Health club
4. Physical activity
5. Weight loss (Level 4)

This section contains 19 articles.

1. Exercise (Level 3)
2. Aerobic exercise
3. Anaerobic exercise
4. Aerobics
5. Calisthenics
   1. Crunch (exercise)
   2. Plank (exercise)
   3. Pull-up
   4. Push-up
   5. Sit-up
6. High-intensity interval training
7. Jumping jack
8. Pilates
9. Strength training
   1. Bench press
   2. Deadlift
   3. Squat (exercise)
10. Stretching
11. Yoga as exercise

This section contains 13 articles.

1. Hygiene (Level 3)
   1. Anal hygiene
   2. Bathing (Level 4)
   3. Body odor
   4. Feminine hygiene (Level 4)
   5. Hair care
   6. Hand washing
   7. Oral hygiene (Level 4)
      1. Dental plaque
   8. Skin care
2. Grooming
3. Hair removal
   1. Shaving (Level 4)

This section contains 27 articles.

1. Comb
2. Dental floss
3. Deodorant
4. Facial tissue
5. Hairbrush
6. Hair conditioner
7. Hand sanitizer
8. Lip balm
9. Menstrual cup
10. Menstrual pad
11. Moisturizer
12. Mouthwash
13. Napkin
14. Safety razor
15. Shampoo
16. Shaving cream
17. Shower gel
18. Straight razor
19. Sunscreen
20. Tampon
21. Toilet paper
22. Toothbrush
23. Toothpaste
24. Toothpick
25. Towel
    1. Paper towel
26. Wet wipe