Hi, Thanks for asking the query, Hypersalivation can contribute to drooling of saliva from the mouth if there is inability to keep the mouth closed or difficulty in swallowing excess saliva at night. There are many factors that contribute to this such as GIT disturbances, pregnancy, excessive starch intake, pancreatitis, liver diseases, oral infections. I would suggest you to visit the Dentist and get thorough checkup done. Drugs such as anticholinergic can be useful. Use of antiseptic mouthwash will have drying effects. Hope this helps out. Regards..