Fainting and loss of bladder control: what to know

Bladder loss can occur with several types of blackout and is not enough to identify the cause. A seizure may involve rhythmic jerking, a bitten tongue, prolonged confusion, or unusual movements, while fainting more often has a warning such as warmth, nausea, or dimming vision and a quicker return to awareness. These patterns overlap, so do not try to diagnose from one sign. Dehydration, anaemia, hypoglycaemia, and an irregular rhythm such as Atrial Fibrillation may also contribute to collapse.

Clear nearby hazards, cushion the head, and time the episode. Do not restrain jerking movements or put anything in the mouth. Once breathing is normal, turn the person on their side and stay with them. Do not offer food, drink, or medicine until they are fully alert. Note eye position, colour change, movements, tongue injury, bladder loss, and the sequence of recovery for the clinician.

Call emergency services if the person is not breathing normally, does not regain awareness, has repeated episodes without recovering, is seriously injured, or develops new weakness, speech difficulty, or severe breathing trouble. Seek prompt medical review after a first blackout, an episode with prolonged confusion, or any unexplained recurrence. Avoid driving, bathing alone, heights, and swimming alone until advised.

Ask whether the account suggests fainting, seizure, or another cause; which heart, blood, or neurological checks are needed; and what activities should be avoided while the cause is unclear. Bring a witness description or video only if it was obtained safely.