What should you know about lack of appetite nausea fatigue?

Nausea can reduce food and fluid intake, while dehydration can add tiredness, dizziness and a dry mouth. Anaemia, coeliac disease, chronic kidney disease and COVID-19 can each present with some combination of fatigue, appetite change or nausea. Alcohol use disorder may also affect nutrition and energy.

Burnout and chronic fatigue syndrome can involve profound fatigue, but nausea or appetite loss may have another cause at the same time. The combination does not identify one diagnosis by itself; timing, medicines, hydration, sleep and other symptoms guide assessment.

Take frequent small sips of water or an oral rehydration drink if tolerated. Try plain, small meals, cool foods or bland snacks, and avoid strong smells if they trigger nausea. Rest, but move gently when able. Keep a note of vomiting, urine changes, fever, pain, bowel symptoms and medicines.

Arrange a clinician review when symptoms do not settle, keep returning, or interfere with eating, drinking or daily tasks. Do not stop prescribed medicine without advice.

Seek urgent care for confusion, fainting, severe abdominal or chest pain, blood in vomit or stool, severe headache, breathing difficulty, very little urine, or inability to keep fluids down. Rapid worsening, marked weakness, or signs of dehydration such as dizziness on standing also warrant prompt attention.

Tell your doctor when each symptom began and ask whether dehydration, infection, anaemia, digestive disease or a medicine effect should be checked. Ask which fluids and foods are suitable, whether tests are needed, and what warning signs should change your plan.