Body aches and loss of appetite: what should you know?

Influenza and COVID-19 can reduce appetite while causing fever, tiredness, and muscle aches. Gastroenteritis may add nausea, vomiting, cramps, or diarrhoea. Gastritis and peptic ulcer disease can make eating uncomfortable, especially with upper abdominal pain or burning. Hepatitis A may cause poor appetite with nausea, dark urine, pale stools, or yellow skin and eyes. Depression can affect appetite and energy without an obvious infection. Persistent or progressive appetite loss with abdominal symptoms needs assessment because the causes range from treatable digestive problems to less common serious disease, including pancreatic cancer. These symptoms alone do not identify a diagnosis.

Take frequent small sips of water or oral rehydration fluid. Try small portions of bland, nourishing foods when able, and avoid alcohol while unwell. Do not stop prescribed medicines without advice, but review any recently started medicine with a clinician or pharmacist. Keep a note of food and fluid intake, vomiting or bowel changes, pain location, fever, urine colour, and weight change. Rest, and use separate utensils or careful hand hygiene if an infectious illness is possible.

Seek urgent help for severe abdominal pain, vomiting blood, black stools, confusion, fainting, severe dehydration, or yellowing with marked illness. Arrange prompt care if you cannot keep fluids down, urine becomes very dark or scant, fever persists, or appetite loss is accompanied by ongoing vomiting. Make an appointment for unexplained appetite change that continues, returns, or causes weight loss or weakness.

Could my medicines or a digestive illness explain these symptoms? How can I maintain fluids and nutrition? Which changes in pain, stools, urine, or weight should I report promptly?