There are many reasons for drooling in sleep, which may be caused by physiological factors or pathologic factors.
1. Physiological factors: newborns and young children, due to the incomplete development of the nervous system, resulting in incomplete closure of the corners of the mouth, drooling phenomenon can occur in sleep. Children during tooth replacement or teething, the eruption of the teeth can be a reflex stimulation of the trigeminal nerve, resulting in drooling; late pregnancy, the increasing uterus oppression of the surrounding organs, resulting in poor breathing and acid reflux, may cause drooling in bed.
2. Pathological factors: common disease factors include local nerve inflammation, cranial diseases, oral diseases and so on. Facial nerve spasm, resulting in the mouth crooked, the phenomenon of sleep drooling.
Craniocerebral diseases such as cerebral thrombosis, Alzheimer’s disease, etc., due to thrombus compression of the nerves leading to the distortion of the mouth and eyes, and ultimately the phenomenon of drooling in sleep. Oral diseases such as dental caries, inflammation of the gums, mouth ulcers and other oral diseases, leading to excessive secretion of salivary glands and difficulty in closing the corners of the mouth, all appear to drool in their sleep.
Persistent drooling requires prompt medical attention and a doctor’s examination to determine the disease.