Fainting with eyes open: what it can mean

Eyes may remain open, partly close, or flutter during a faint. The appearance alone cannot distinguish fainting from a seizure or another cause of collapse. A typical faint is often preceded by warmth, nausea, sweating, blurred vision or light-headedness, followed by a quick return of awareness after lying down.

Record what happened before the event, how long the person was unresponsive, whether there was shaking, and how they felt afterward. Dehydration, anaemia, low blood sugar and heart-rhythm problems such as Atrial Fibrillation can contribute to collapse, but one episode does not identify its cause.

Help the person lie flat and protect them from nearby hazards. Raise their legs if there is no injury that makes this unsafe, loosen tight clothing and check that they are breathing normally. Do not give food, drink or tablets until they are fully alert. Turn them on their side if they are vomiting, and stay with them while awareness returns.

If they do not wake promptly, place them in the recovery position and call emergency services. Do not make them stand suddenly; sitting first can reduce another fall.

Get emergency help for fainting during exercise, chest pain, severe breathlessness, a serious injury, an irregular pounding heartbeat, repeated episodes close together, or failure to regain normal awareness. Seek prompt assessment after a first unexplained faint, especially when there is no clear trigger or there is a known heart condition.

Ask whether your description suggests a reflex faint, whether blood pressure should be checked lying and standing, and whether an ECG or blood tests are appropriate. Mention medicines, fluid intake, skipped meals, family history of sudden cardiac death, and any unusual movements or confusion.