What should you know about battle fatigue?

Fatigue can feel like low energy, reduced stamina, heavy limbs, or difficulty thinking. Repeated stress, disrupted sleep, emotional strain, dehydration, infection, or missed meals can all contribute. It may occur alongside anxiety, low mood, irritability, or changes in sleep.

Ongoing symptoms may also occur with conditions such as [Anaemia](/conditions/anaemia/), [Burnout](/conditions/burnout/), [Chronic Kidney Disease](/conditions/chronic-kidney-disease/), [Coeliac Disease](/conditions/coeliac-disease/), or [Dehydration](/conditions/dehydration/). Fatigue itself does not identify one cause.

Keep a simple record of sleep, activity, meals, fluids, mood, and when the tiredness worsens. Aim for a steady sleep routine, regular nourishing food, gentle movement within your limits, and quiet recovery periods. Reduce alcohol and avoid using stimulants to push through exhaustion.

Arrange a primary-care appointment if fatigue persists, limits work or daily tasks, or follows a distressing event. Mention medicines, sleep changes, snoring, mood symptoms, and recent illness; the clinician may consider [COVID-19](/conditions/covid-19/) or other causes such as [Chronic Fatigue Syndrome](/conditions/chronic-fatigue-syndrome/).

Seek urgent care for fatigue with chest pain, severe breathlessness, fainting, new confusion, one-sided weakness, or signs of serious dehydration. Promptly contact a clinician if low mood, hopelessness, or thoughts of self-harm accompany the exhaustion. Sudden deterioration after heavy alcohol use also needs medical attention; [Alcohol Use Disorder](/conditions/alcohol-use-disorder/) may require tailored support.

Ask what causes should be checked, whether your sleep or medicines may be contributing, and what level of activity is sensible. Bring your symptom record and explain how fatigue affects concentration, work, driving, exercise, and relationships.