Drooling is medically called salivation, which can be caused by various reasons, and can be divided into physiological and pathological salivation. Occasional salivation during sleep is mostly normal, and young children often have salivation caused by food stimulation and eruption of milk teeth, so no intervention is needed. Pathological factors are mostly seen in neurological diseases, oral diseases, etc., which may be congenital diseases or developed later in life, and need to be treated for the causes: 1. -After 6 months, breastfeeding alone can not meet the needs of growth and development, at this time it is recommended to start adding supplementary food. Due to the stimulation of food to the nerve and salivary gland, the secretion function of salivary gland is enhanced and saliva increases, which leads to the phenomenon of salivation; 3, the eruption of milk teeth: the eruption of milk teeth can stimulate the gingival sensory nerve and increase the secretion of salivary gland. Pathological salivation: 1, oral diseases: can be seen in oral inflammatory diseases, such as pharyngitis, stomatitis, gingivitis, tongue inflammation, salivary gland inflammation, etc. It may also be triggered by denture discomfort, or the presence of tumors in the mouth to stimulate salivary gland secretion, which can cause pain and salivation and other symptoms. If it is an inflammatory disease of the mouth, you can apply antibiotic preparations to reduce inflammation, such as penicillin, metronidazole, etc., can also be supplemented with ibuprofen and other drugs to help relieve pain, and if necessary, vitamin supplements to help treat. If it is caused by dentures, it is recommended to seek medical advice and replace suitable dentures in time. If there are tumor irritants, it is recommended to follow medical advice for systematic treatment; 2. Neurological diseases: congenital diseases, such as 21-trisomy, congenital hypothyroidism, etc., cause delayed development of the nervous system, mental retardation, and more symptoms of open mouth salivation; acquired diseases, such as stroke, Parkinson’s, encephalitis, facial nerve palsy, etc., salivary glands are innervated by sympathetic nerve and linguopharyngeal nerve, and their center is located in the thalamus, which can The salivary gland is innervated by sympathetic nerve and linguopharyngeal nerve, and its center is located in the thalamus, which can cause salivary manifestations in related parts of the body. Because of the complicated etiology, each disease requires individualized treatment plan and cannot be generalized. Therefore, it is recommended that patients seek timely medical attention to avoid delaying treatment.