Drooling symptoms after sleeping may be related to increased saliva secretion due to oral inflammation, which is not swallowed in time. It may also be related to the sleep position, sleeping on the stomach or side sleep is easy to press the parotid gland, so that saliva secretion increases and drooling symptoms appear. Patients with gastrointestinal disorders such as reflux gastritis or esophagitis may also have drooling symptoms while sleeping. If there is limited movement of one side of the face, crooked mouth and eyes, drooling at the corners of the mouth, it may be related to facial neuritis, and should be promptly seen by a hospital, which can take vitamin B1, vitamin B12 and other nerve-nourishing drugs, and apply anti-viral drugs with acupuncture and other treatments. Drooling while sleeping, if accompanied by dizziness, headache, numbness of one side of the limb or restricted movement and other symptoms, it may be cerebrovascular disease, you can do head CT and other tests to treat the cause.