Drooling in children, known as salivation in written language, is mostly a normal physiological phenomenon. The regulation of salivary secretion depends on local stimulation in the mouth and on the reflex of the nerve center. Newborn babies are born with little saliva because the central nervous system and salivary gland functions are not yet mature. By 3 months, saliva secretion gradually increases, and individual infants have a strong secretion ability and will drool. By 6 to 7 months of age, the baby’s milk teeth erupt, stimulating the trigeminal nerve will also increase saliva secretion, plus the small volume of the child’s mouth, can not swallow, regulate the saliva in the mouth, so the accumulation will naturally flow out. Salivary secretion is also governed by nerves, and the salivary secretion of young children is often caused by the inhibition of salivary secretion and poor swallowing function because the brain development is not yet perfect. When the child is 2-3 years old, the swallowing function and the central nervous system will be further improved, so the child will not drool. If the child grows up and still drools, the drooling may be pathological rather than physiological. This may be caused by poor neurological or endocrine development, inflammation in the oral cavity, or indigestion, and must be treated. For example, when the oral mucosa is inflamed, the salivary glands are stimulated to secrete and the saliva increases, and some of them have yellow or light red mucus and smell bad. There are also individual children, due to incomplete development of brain intelligence or endocrine system lesions, can also be manifested as drooling, which should be seen in pediatrics. After 6 months of age, small grains of rock candy can be placed in the mouth of the baby to gradually develop the habit of swallowing saliva. Feed reasonably and eat more fresh vegetables and fruits to enhance resistance to disease. Change the bad habit of forceful kissing and hand pinching the cheeks of children. For children who salivate, pay special attention to personal hygiene: saliva should be wiped off with a clean and soft handkerchief or paper towel. Collars and lapels should be changed and washed regularly. Protect the skin of the chin and forehead by padding with clean sand cloth or using a bib, etc. If the skin around the lips, jaw and neck has been flushed, erosion or even peeling, you should often wash the local area with warm water, and then apply a little ointment or oil. Sleeping drool is very common, generally normal people still have a small amount of saliva constantly secreted during sleep to smooth the oral mucosa to protect the teeth. In special cases, such as dreams of delicious food, will stimulate the secretion of saliva, saliva secretion increases, it will lead to drooling; improper sleeping posture sometimes also triggers the phenomenon of drooling; or gingivitis, dental caries, eating sweet and sour food before going to bed, drinking alcohol, will have this phenomenon, need to find further causes for treatment. This problem starts from the characteristics of pediatric oral cavity. The oral cavity of children changes with growth and development. The newborn’s mouth has no teeth, short and wide tongue, thick fat layer in both cheeks, well developed facial muscles, and thickened and raised mucous membrane of the jaws. All these are conducive to catching the nipple and coordinating sucking movements during breastfeeding. In infants, the alveolar process has not yet developed because the teeth have not yet erupted, and the palate and the floor of the mouth are relatively shallow. 6-7 months old, the amount of saliva secretion gradually increases, and the swallowing reflex of the child is not sensitive during this period, and the oral secretion of saliva is not blocked by the alveolar process and will not be swallowed. Therefore, at this time, children often appear drooling phenomenon, this period of drooling is a physiological salivation, no treatment. With the growth and development, the eruption of teeth, the alveolar protrusion gradually form the palate slowly increase, the bottom of the mouth gradually deepen, and have swallowing action training, drooling phenomenon will improve. It is important for parents to note that some infant salivation is pathological and indicates that the infant is suffering from certain diseases. If there is more salivation and inflammation in the corners of the mouth, it is salivation caused by stomatitis; if there is congestion or ulceration of the oral mucosa, refusal to eat and irritability, it is salivation caused by stomatitis; if there is atrophy of the muscles on one or both sides of the face and weakness of chewing, it is salivation caused by indigestion and intestinal roundworm; if there is mental underdevelopment and dementia, it is caused by the underdevelopment of the brain nervous system. The above pathological salivation needs to be checked and treated in hospital. Generally speaking, once the primary cause is eliminated, pediatric salivation will also improve or be cured. Since saliva contains digestive enzymes and other substances, it has a certain irritating effect on the skin. Children who salivate a lot can also suffer from localized skin redness and even erosion and peeling due to saliva often soaking the skin on the chin and other areas. Therefore, local care is very important: usually available soft quality loose dressing pad in the neck to accept the absorption of drool, and often replaced; often wash the face, jaw and neck with warm water, cold season can be coated with grease skin care.