Answered by : maneesh
on Sat, 17 Mar 2012
Hi! In general, in the initial/dozy stage of sleeping, one can have sudden jerks, sensations or flashes of light. We call them hypnagogic phenomenon. As long as they are not happening daily, or are not preventing you from sleeping, they are normal. If they are more frequent or intense, then do consult a sleep disorder specialist.
Dr Maneesh Gupta
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