What should you know about constant nausea and fatigue?

Nausea can reduce appetite and fluid intake, which may worsen tiredness. Gastrointestinal infection, COVID-19, Coeliac Disease and dehydration are possible explanations. Anaemia can reduce energy, while Burnout or Chronic Fatigue Syndrome may be considered when fatigue is prolonged and other features fit. Chronic Kidney Disease or Alcohol Use Disorder can also affect energy and nausea. These possibilities overlap, so the pattern matters more than one symptom.

Take frequent small sips of fluid and choose small, plain meals if tolerated. Keep a record of onset, food, medicines, sleep, bowel symptoms, fever and urine output. Review new medicines with a clinician rather than stopping prescribed treatment suddenly. Book an assessment when symptoms persist, interfere with eating or work, or keep returning.

Seek urgent help for severe abdominal pain, chest pain, confusion, fainting, blood in vomit or stool, very little urine, breathing difficulty or inability to keep fluids down. Prompt care is needed for worsening weakness, high fever or signs of dehydration.

Ask whether you need blood or urine tests, whether a medicine or digestive problem may contribute, and how to maintain hydration while symptoms continue.