This page summarises publicly available NHS information for educational purposes only. It is not medical advice or a diagnosis. Always consult a qualified healthcare professional.
What is feeling faint or lightheaded?
Feeling faint or lightheaded is common and usually caused by standing up too quickly, not eating or drinking enough, being too hot, or anxiety. Fainting happens when blood pressure drops suddenly and the brain does not get enough blood.
When NHS resources suggest seeing a GP
- You keep fainting or feeling faint
- You fainted for no obvious reason
- You fainted during exercise
- You have chest pain or a racing heartbeat when feeling faint
Self-care information from NHS
- Lie down with legs raised if you feel faint
- Sit with your head between your knees
- Drink water and eat something
- Stand up slowly from sitting or lying down
Common questions
Why do I feel faint when I stand up?
This is called orthostatic hypotension — your blood pressure drops when you stand. It is common and usually not serious. Standing up slowly, staying hydrated, and avoiding long periods of standing can help.
When is fainting serious?
Fainting during exercise, with chest pain, or with an irregular heartbeat needs medical assessment. Frequent unexplained fainting should also be checked.
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This page is for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional about your individual situation. NorMed organises publicly available NHS information and is not affiliated with the NHS.