Reasons for extreme fatigue

Fatigue is more than feeling ready for bed: it can reduce concentration, motivation and physical stamina. A sudden change may occur with COVID-19 or dehydration, while ongoing low energy can accompany anaemia, coeliac disease or chronic kidney disease. Emotional overload and prolonged work pressure can contribute to burnout. Alcohol use can disturb sleep and leave you tired even after resting. Chronic Fatigue Syndrome is another possible explanation when disabling fatigue persists alongside other symptoms. These possibilities overlap, and fatigue alone cannot identify its cause.

Record when the tiredness began, how it affects daily activities, your sleep pattern, recent illness, fluid intake, alcohol use and any new medicines. Regular meals, adequate fluids, a consistent sleep routine and gentle activity may help while you arrange an appointment. Do not stop prescribed treatment without advice. A clinician may ask about mood, bleeding, digestion, snoring and weight change, then decide whether an examination or blood tests are useful.

Arrange medical advice if fatigue is persistent, worsening, unexplained or interfering with work, driving, exercise or self-care. Seek urgent help for severe breathlessness, chest pain, fainting, new confusion, one-sided weakness, inability to keep fluids down or signs of a serious allergic reaction. Do not drive if exhaustion makes you struggle to stay alert.

Ask what causes fit your pattern of symptoms, whether your medicines or sleep could be contributing, which examinations or tests may help, and what changes should prompt urgent review. Bring a list of medicines and a brief fatigue diary.