Seizure after COVID: what to know

COVID can occur alongside fever, dehydration, sleep disruption, low oxygen, or changes in medicines. These factors can lower the brain's seizure threshold, but a seizure may also point to another problem that happened during or after the infection. A single event does not by itself establish epilepsy. The clinician will want a careful account of what happened before, during, and after the episode, including fever, breathing difficulty, headache, confusion, injury, and any missed medicines.

Other possible contributors include alcohol withdrawal, low blood sugar, or inflammation affecting the coverings of the brain. These conditions need different treatment; see information on Alcohol Use Disorder, Hypoglycaemia, or Meningitis if they are relevant to your symptoms.

Keep the person safe on the floor, turn them onto their side when possible, move hard or sharp objects away, and loosen tight clothing around the neck. Do not hold them down and do not put food, drink, or anything else in their mouth. Note when the movements begin and end, whether breathing changes, and how alert the person becomes afterwards. Arrange urgent clinical advice after a first seizure, even if recovery seems complete. Bring a list of medicines, recent COVID treatments, temperature readings, and details of alcohol or recreational drug use.

Call emergency services if the seizure continues, repeats without full recovery, causes a serious injury, happens in water, or breathing does not return normally. Emergency help is also needed for severe headache, stiff neck, new weakness, persistent confusion, blue lips, or marked difficulty breathing. Do not drive yourself for assessment if you remain confused or unsteady.

Ask whether the episode could have been triggered by fever, low oxygen, low blood sugar, a medicine interaction, or another neurological problem. Ask which tests are appropriate, whether current medicines should change, what precautions apply at home, and how to recognise a repeat event.