What should you know about general fatigue?

Fatigue is more than feeling ready for bed: it may involve low stamina, slowed concentration, or needing extra effort for ordinary tasks. Recent illness, emotional strain, Burnout, Alcohol Use Disorder, and Dehydration can contribute. Anaemia may cause tiredness with breathlessness or paleness. Coeliac Disease and Chronic Kidney Disease are possible medical contributors, while Chronic Fatigue Syndrome involves a longer-lasting pattern with symptoms that need careful assessment. COVID-19 can also be followed by fatigue. These symptoms overlap, so fatigue alone does not establish a diagnosis.

Keep a steady sleep schedule, eat regular nourishing meals, drink fluids, and pace demanding tasks with planned rests. Avoid using alcohol as a sleep aid, and review medicines or supplements with a clinician rather than stopping prescribed treatment yourself. Keep a simple record of sleep quality, mood, exertion, weight change, fever, bleeding, breathlessness, and how long the fatigue lasts. Book a medical review if it continues, worsens, or affects work, study, driving, or self-care.

Seek urgent help for chest pain, severe breathlessness, fainting, new confusion, one-sided weakness, or thoughts of self-harm. Prompt assessment is also needed for fatigue with black or bloody stools, heavy bleeding, persistent vomiting, severe dehydration, or a high fever. A clinician may ask about sleep, mental health, diet, medicines, alcohol, and recent infection, then choose an examination or tests.

Could anaemia, thyroid or kidney problems, sleep disruption, mood, or a recent infection explain this? Which tests are appropriate? How should I pace activity while we investigate the cause?