Mild dizziness: what to know

Lightheadedness can happen with dehydration, heat exhaustion, low blood sugar, anaemia, anxiety, or a drop in blood pressure. A spinning sensation triggered by turning in bed or moving the head can occur with benign paroxysmal positional vertigo. Dizziness with a racing or irregular heartbeat needs assessment because heart rhythm problems can contribute. Note when it starts, what you were doing, whether movement triggers it, and whether there is hearing change, headache, weakness, or fainting.

Sit or lie down as soon as dizziness begins, rise slowly, and avoid driving, heights, or machinery until you feel steady. Sip fluids if you may be dehydrated and eat a suitable snack if you have missed a meal, unless a clinician has given different advice. Keep a symptom record and arrange a GP assessment if episodes recur, last longer, or interfere with walking or work. Do not change prescribed medicines without advice.

Call emergency services for dizziness with facial drooping, one-sided weakness or numbness, trouble speaking, severe chest pain, severe breathlessness, fainting, a sudden severe headache, or new confusion. Seek urgent assessment for persistent vomiting, inability to walk safely, a very fast or irregular heartbeat, or dizziness after a significant injury. These warning signs need prompt evaluation regardless of whether the dizziness feels mild at first.

Does the sensation suggest a balance, circulation, blood sugar, blood count, or medication problem? Should my blood pressure, heart rhythm, hearing, or blood tests be checked? What should I do if an episode returns?