Drooling while sleeping can be traced to several causes, which include age, illness, deep sleep, or even sleeping posture. Excessive drooling can be an inconvenience and, at times, an embarrassment.

If you are someone who has woken up to find a pool of drool on your pillow and wondered what may be causing it, then there are a number of causes that may be behind it. Drooling during sleep is a ...