Anorexia may refer to:

• Anorexia (symptom), the symptom of poor appetite whatever the cause
• Anorexia nervosa, an eating disorder of excessive weight loss and usually undue concern about body shape
• Anorexia mirabilis, people who would starve themselves, sometimes to death, for the sake of piety

• Anorexia Nervosa (band), a French symphonic black metal band
• Anorexia Nervosa, a two-part album by the band Showbread
  • Anorexia (album)
  • Nervosa (album)

• Sexual anorexia, a lack of "appetite" for romantic-sexual interaction

• Anorectic
• Hunger strike