Loss of appetite means eating less than usual or having a reduced desire to eat. Brief decreases are common, but persistent or rapidly worsening appetite loss can signal an underlying problem. This page explains typical causes, when to get medical review, what an assessment may involve, and general measures that can help support intake at home.
Appetite loss is a symptom, not a single disease. Frequent causes include respiratory and other infections, digestive disorders (reflux, gastritis, peptic ulcer), metabolic or endocrine conditions (thyroid problems, diabetes), mood disorders such as depression and anxiety, chronic illnesses, side effects of some medications, and age-related changes. Short-term contributors include fatigue, stress, altered taste or smell, and heavy physical activity.
Mild, short-lived appetite changes often resolve on their own. Seek medical evaluation if appetite loss leads to unintended weight loss, persists for several weeks, or is accompanied by concerning signs such as high fever, severe abdominal pain, persistent vomiting, difficulty swallowing, bleeding, yellowing of the skin or eyes, marked weakness, or signs of dehydration. For urgent or rapidly worsening symptoms, contact emergency services.
A clinician will take a history and perform a physical exam: duration and pattern of appetite change, weight trends, other symptoms, current medications, and psychosocial factors. Depending on findings, tests may include blood work (complete blood count, thyroid tests, liver and kidney function), urine tests, or imaging. Referrals commonly considered include gastroenterology, endocrinology, Infectious Diseases and Clinical Microbiology, psychiatry, or dietetics/nutrition specialists.
Simple adjustments can help maintain intake: offer smaller, more frequent meals; choose energy- and nutrient-dense but easy-to-eat options (soups, smoothies, milk‑based drinks); vary flavors and textures to make meals more appealing; keep regular meal times; and avoid vigorous exercise immediately before eating. These are general tips—if appetite loss continues or weight drops, see a healthcare professional.
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