Signs of dizziness

A room-spinning sensation brought on by turning in bed can suggest a balance-organ problem such as benign paroxysmal positional vertigo. Feeling faint after standing, heat exposure, vomiting or poor fluid intake may occur with dehydration or heat exhaustion. Weakness, breathlessness or marked tiredness can accompany anaemia, while shaking, sweating and confusion may occur with hypoglycaemia.

Dizziness with a racing or irregular heartbeat needs medical assessment because rhythm problems, including atrial fibrillation, can cause lightheadedness. Persistent worry or rapid breathing can occur with generalised anxiety disorder. These are possible explanations, not a diagnosis; the same sensation can have different causes.

Sit or lie down immediately, move slowly and avoid driving, ladders or machinery until the sensation has passed. Drink fluids if you can swallow safely and have no medical restriction on fluids. Note whether the symptom is spinning or faintness, what you were doing, how long it lasted, recent illness, medicines, food and associated symptoms. Recurrent, unexplained or worsening episodes merit a clinical appointment.

Call emergency services for sudden dizziness with facial drooping, one-sided weakness or numbness, trouble speaking, severe headache, chest pain, severe breathlessness, fainting, new confusion or inability to walk. Seek prompt care after a head injury, for persistent vomiting, or when an irregular heartbeat accompanies faintness.

Ask which type of dizziness you are describing, whether blood pressure, blood tests, glucose or heart-rhythm checks are appropriate, and whether a balance assessment or medicine review is needed. Share your episode record.