The Exploding Head Syndrome (EHS) is an unusual sleep disorder. It is not associated with an underlying pathologic process ("benign") but it can cause the patient distress.
Features of EHS:
(1) Episodes occur during sleep-wake or wake-sleep transitions.
(2) The person hears a loud noise or explosion within one's head, sometimes accompanied by a flash of light.
(3) After an episode the patient may experience fear or apprehension.
In some patients the episodes are associated with stress. Some patients experience sleep paralysis.
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