Tiredness and weakness

Tiredness feels like reduced energy or a need to rest. Weakness means a muscle or group of muscles cannot produce its usual force, such as struggling to climb stairs, grip an object or lift an arm. The two can occur together with viral illness, dehydration, anaemia, poor nutrition, prolonged stress or medication effects. Weakness affecting one side, speech, balance or coordination has a different level of urgency from general heaviness.

Rest after illness, drink regularly and eat balanced meals with a reliable source of protein. Avoid strenuous exercise until you understand new weakness, and use support on stairs if balance is affected. Record when symptoms began, which activities are difficult, whether both sides are affected and what other symptoms appear. Book a medical review when weakness persists, limits routine tasks or keeps returning.

Call emergency services for sudden weakness of the face, arm or leg, difficulty speaking, severe breathing trouble, chest pain, fainting or new confusion. Seek urgent advice for rapidly worsening weakness, inability to walk, severe dehydration, high fever or dark urine with muscle pain. Arrange routine assessment for ongoing tiredness, reduced strength, weight change, numbness or repeated falls.

Ask whether the pattern suggests anaemia, infection, dehydration, nutritional deficiency, medication effects or a nerve or muscle problem. Explain whether weakness is one-sided, painful, intermittent or linked to exertion, and bring a list of medicines and recent illnesses.