Does hypothyroidism cause fatigue?

Hypothyroidism-related fatigue may feel like low energy, unusual effort during ordinary tasks, slower thinking, or a need for more rest. It can occur with feeling cold, dry skin, constipation, low mood, or changes in weight. Fatigue is also linked with poor sleep, anaemia, infection, stress, depression, and medicine effects. The symptom is real, but it does not identify one diagnosis by itself.

Keep a simple record of sleep, activity, meals, mood, and when energy drops. Use manageable activity with rest breaks, keep regular sleep and wake times, and avoid relying on stimulants to push through severe tiredness. Arrange a clinical review if fatigue lasts, limits daily life, or returns repeatedly. A clinician may consider thyroid tests and other checks based on your history. Take prescribed medicine as directed and do not adjust it independently.

Get prompt medical advice for fatigue with breathlessness on small efforts, palpitations, unexplained bleeding, fever, or marked changes in mood. Seek urgent help for chest pain, severe breathing difficulty, fainting, sudden confusion, or thoughts of harming yourself.

Ask whether thyroid function testing is suitable and whether another cause should be checked. Share how fatigue affects work and self-care, how you sleep, any recent illness, and all medicines and supplements.