Loss of Appetite

Loss of appetite — reduced desire to eat — is a common symptom with many possible causes. Brief episodes during illness are normal, but persistent appetite loss can lead to weight loss and nutritional problems and should be evaluated.

Table of Contents

Quick Facts

  • Medical term: Anorexia (the symptom)
  • ICD-10: R63.0
  • Common causes: Infection, GI, medication, depression

Common Causes

  • Acute illness (cold, flu, COVID-19)
  • Gastrointestinal conditions (gastritis, IBD, gallbladder disease)
  • Medication side effects (chemotherapy, antibiotics, opioids)
  • Pain
  • Depression or anxiety
  • Chronic disease (heart failure, kidney disease, COPD, cancer)
  • Thyroid problems (especially hypothyroidism)
  • Pregnancy (early)
  • Aging and changes in taste/smell
  • Dementia and cognitive decline

Self-Care During Illness

  • Try small, frequent meals
  • Choose nutrient-dense foods (smoothies, nut butter, yogurt)
  • Stay hydrated
  • Eat what sounds appealing rather than forcing 'healthy' foods
  • Use liquid nutritional supplements if intake is low

When to See a Doctor

  • Appetite loss lasting more than 1–2 weeks
  • Associated weight loss (>5% over 6 months)
  • Difficulty swallowing
  • Persistent nausea or vomiting
  • Abdominal pain
  • Yellowing of the skin or eyes
  • Symptoms of depression

Related Symptoms

Weight Loss

Often follows appetite loss

 Depression

Common cause

 Nausea

Frequent companion

 Hyperthyroidism

Can sometimes affect appetite

Frequently Asked Questions

Is loss of appetite a sign of cancer?

It can be, especially when combined with weight loss, fatigue, or other symptoms. However, many other conditions cause appetite loss — evaluation focuses on identifying the cause.

Why do I lose my appetite when I'm sad?

Depression affects the brain regions that regulate appetite and motivation. Some people lose appetite while others overeat — both patterns are common.

Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. If you are experiencing a medical emergency, call your local emergency number immediately.

References

  • American Academy of Family Physicians. Anorexia (Symptom) Evaluation.