Have you ever thought about the reason for drooling, grinding teeth, dreaming, shaking during sleep? Sometimes there are 5 frequent symptoms during sleep, which may be health warning signals!Why does it suddenly shake when sleeping?Someone's body suddenly trembled as they were about to fall asleep. Why is this happening? Sun Jianhua, deputy chief physician of the Mental Health Center of Hebei Province, introduced in an article published on the Hebei News Network in 2022 that there are many different opinions about this matter, and the real explanation is "Hypnic jerk (myoclimactic syndrome)"...