2 years old baby sleep drooling, may be due to nasal congestion, mouth ulcers, oral inflammation and other diseases caused by the impact, but also may be improper sleeping position caused. If this phenomenon occurs for a long time, parents should promptly take the baby for a detailed examination, symptomatic treatment. Common causes: 1, nasal congestion: baby cold or nasal congestion caused by rhinitis, because of poor breathing, sleep often breathe through the mouth, will lead to drooling; 2, mouth ulcers: baby due to a lack of vitamin B, zinc elements leading to mouth ulcers, due to swallowing pain, will also lead to sleep drooling phenomenon; 3, oral inflammation: baby has stomatitis, pharyngitis and other diseases. Due to inflammatory stimulation, will lead to increased secretion of saliva, due to the baby’s shallow mouth, not yet able to swallow all the saliva secreted in time, often leading to drooling at bedtime; 4, improper sleeping position: 2-year-old babies often like to sleep on their sides, lying on their stomachs, easy to lead to pressure on one side of the facial nerve, leading to increased secretion of saliva in the mouth, so there will also be drooling at bedtime. Treatment: 1, when the baby has cold symptoms, parents should pay attention to the child to drink more water, under the guidance of the doctor to the child to take pediatric cold punch to improve the symptoms; 2, simple rhinitis baby can be under the guidance of the doctor to take rhinitis Kang tablets for treatment, sinusitis baby can be under the doctor’s orders to take Tongkang rhinitis granules with rhinitis Kang tablets, external drops of rhinitis liquid treatment; 3, mouth ulcers, stomatitis, when The baby should drink more water and parents can use watermelon cream spray or apply montelukast on the ulcer surface to relieve pain and help promote the healing of the ulcer surface under the guidance of the doctor; 5. For treatment, pay attention to the correct use of medication under the guidance of a doctor.