Breath and sweat samples will be collected from people who have been admitted to hospital after a potential seizure and analysed by the team. The researchers then hope to identify a pattern of small molecules that can distinguish seizures from other events, and perhaps determine the severity of the seizure.

Determining whether someone has had an epileptic seizure, or another event, can be challenging and result in the wrong diagnosis. A 'seizure test' used after the event would therefore be very helpful.

Researchers have used small molecules released from the body in breath and sweat to detect cancers and other diseases; this study will determine whether a similar method can be used to detect whether someone has had an epileptic seizure.

Inclusion Criteria:

1. Patients who have been admitted to either University College London's Queen's Square EEG-telemetry unit or Chalfont Centre for Epilepsy, for diagnosis of seizure events.
2. Patients aged 18 years or above

Exclusion Criteria:

1. Patients with active infection or who have taken antibiotics within 4 weeks
2. Patients on immunosuppressive medications
3. Patients with co-morbidities preventing breath collection
4. Patients unable to provide informed consent.

People with a diagnosis of epileptic or non-epileptic seizures

If necessary, anonymised data will be shared with other researchers in a case by case scenario. For anonymised data to be shared with commercial entities, a research contract will need to be evaluated.