Nausea and fatigue when not pregnant: what should you know?

A viral illness may bring nausea, tiredness, fever, or body aches. Anaemia can cause low energy, breathlessness, or dizziness, while dehydration may cause thirst, headache, and darker urine. Coeliac disease can affect digestion and energy. Burnout, poor sleep, or alcohol use can contribute, but persistent symptoms should not be dismissed as stress. COVID-19 may include nausea and fatigue, sometimes with respiratory symptoms. Symptoms alone cannot identify one cause.

Rest, drink regularly, and take small bland meals if nausea limits appetite. Review any newly started medicine with a pharmacist or clinician rather than stopping it without advice. Note your menstrual pattern, sleep, food triggers, bowel symptoms, temperature, and urine changes. Arrange a routine appointment when symptoms continue, recur, or reduce daily function.

Seek urgent help for severe abdominal pain, chest pain, trouble breathing, fainting, confusion, blood in vomit or stool, or inability to keep fluids down. Prompt review is also needed for marked dehydration, rapidly worsening weakness, or new yellowing of the skin or eyes.

Ask whether blood tests, infection testing, or a medicine review could clarify the symptoms. Tell the clinician when they began, whether pregnancy has been appropriately excluded, and whether there is weight change, heavy bleeding, fever, or altered bowel habit.