Fatigue

Fatigue is a persistent feeling of tiredness, weariness, or lack of energy that does not improve much with rest or sleep. It can be physical, mental, or both, making everyday tasks feel harder and affecting concentration and motivation. Fatigue is different from ordinary tiredness, which usually eases after a good night's sleep.

Fatigue is one of the most common reasons people see a doctor, and nearly everyone feels run-down at times. Short-lived tiredness after busy periods, poor sleep, stress, or illness is normal and usually improves with rest and recovery. Fatigue that lasts for weeks, has no clear cause, or disrupts daily life, however, warrants attention.

Fatigue often stems from lifestyle factors such as poor or insufficient sleep, stress, anxiety, low mood, lack of physical activity, or an unbalanced diet. It is also a normal part of recovering from infections. Many everyday situations, including a demanding schedule or emotional strain, can leave you feeling persistently drained for a time.

Yes. Persistent fatigue can be a symptom of medical conditions such as anaemia (low iron), an underactive thyroid, diabetes, ongoing infections, sleep disorders, or depression. Some medicines can also cause tiredness. Because the possible causes are wide-ranging, fatigue that continues without an obvious explanation should be evaluated by a doctor to identify any underlying issue.

A doctor explores fatigue by asking about your sleep, mood, lifestyle, diet, stress, and other symptoms, along with your medical history and any medicines. A physical examination and blood tests can check for causes such as anaemia, thyroid problems, or diabetes. This thorough approach helps distinguish lifestyle-related tiredness from an underlying medical condition.

Management depends on the cause. When fatigue relates to lifestyle, improving sleep habits, eating well, staying active, managing stress, and limiting alcohol often help energy return gradually. If a medical condition is found, treating it usually eases the fatigue. A clinician can suggest practical steps and arrange any treatment needed for the underlying cause.

Fatigue itself is rarely an emergency, but seek urgent help if extreme tiredness comes with chest pain, severe shortness of breath, fainting, confusion, slurred speech, weakness on one side, or thoughts of harming yourself. These accompanying symptoms can signal a serious problem, so contact your local emergency services or a crisis line straight away.

Make an appointment if fatigue lasts more than a couple of weeks, does not improve with adequate rest, or has no clear explanation. Also see a doctor if it comes with other symptoms such as weight loss, fever, breathlessness, or low mood, or if it interferes with daily life. A clinician can investigate the cause.