Loss of Appetite

Loss of appetite can happen with physical illness, emotional strain, medicines, or changes in the digestive system.

You may have little interest in food, feel full after a few bites, or find that familiar smells make eating unappealing. Poor appetite is different from choosing to eat less; it can make regular meals feel difficult even when you know your body needs nourishment.

Seek urgent medical help for poor appetite with confusion, fainting, severe weakness, trouble breathing, repeated vomiting, severe abdominal pain, blood in vomit or stool, or an inability to keep fluids down. These features can point to dehydration or a serious illness needing prompt assessment.

Arrange a clinical review when the change persists, is accompanied by unplanned weight loss, swallowing difficulty, fever, jaundice, or a new change in bowel habit.

The causes listed here are alphabetical, not a ranking. Infections such as COVID-19, influenza, gastroenteritis, or hepatitis A can reduce appetite through fever, nausea, tiredness, or altered taste. Gastritis may cause upper abdominal discomfort or nausea around meals.

Depression can alter interest, energy, sleep, and eating patterns. In people with cancer, appetite loss can occur with cancer cachexia or with raised calcium; it deserves individual assessment rather than being assumed to have one explanation.

A clinician will ask when the appetite change began, whether it comes and goes, what foods or drinks are still manageable, and whether there are associated symptoms. They may review medicines, alcohol or substance use, mood, recent illness, and medical history.

The examination may include hydration, mouth and throat, abdomen, and signs of infection or nutritional strain. Blood tests, stool tests, imaging, or a camera examination of the digestive tract may be considered when the history or examination suggests a need.

Treatment focuses on the cause and on maintaining fluid and nutritional intake. An infection, stomach inflammation, low mood, medicine side effect, or metabolic problem each calls for a different plan. Do not stop prescribed medicines abruptly; ask the prescriber whether a change could be contributing.

Small, frequent meals, cool foods, nourishing drinks, and help with shopping or cooking can reduce the effort of eating. Cancer-related appetite problems may benefit from specialist nutrition support or palliative-care input alongside treatment of symptoms such as nausea, pain, or constipation.

Regular meals, adequate fluids, sleep, gentle activity when able, and early treatment of nausea or mouth pain can help protect intake during minor illness. Keep a short record of foods tolerated and symptoms around meals; this can make a pattern clearer at an appointment.

If low mood, caregiving pressure, or eating alone is affecting meals, practical support and a conversation with a healthcare professional can be as useful as changing the menu.

Tell the clinician about altered taste or smell, nausea, vomiting, indigestion, pain after eating, diarrhoea, constipation, mouth sores, low mood, fever, and changes in weight. The combination and timing of symptoms help narrow down the cause.

Ongoing poor intake can leave you dehydrated, tired, dizzy, or short of nutrients. It can also slow recovery from an illness. A planned review gives time to address the underlying problem and arrange nutrition support when ordinary meals are no longer meeting your needs.