Saliva, which is called 'saliva' in medicine, is produced by salivary glands. There are three pairs of large salivary glands (parotid gland, submandibular gland and sublingual gland) and numerous small salivary glands distributed in lip, cheek, palate and floor of mouth. Most of the saliva is water, and also contains some amylase and mucin. Saliva can moisten the oral cavity, facilitate swallowing and help digestion. According to measurement, normal adults secrete 1000-1500 ml saliva day and night. Under normal circumstances, people swallow their saliva autonomously or involuntarily.
Newborn infants due to salivary gland secretion function is not perfect, salivary secretion is small, so generally will not drool. After 4 months, due to the beginning of supplementary food, saliva secretion increases. After 6 months, deciduous teeth begin to sprout, which can stimulate the supragingival nerve and increase the salivary gland secretion reflexively. At this time, children's ability of swallowing saliva has not yet been formed, and too much saliva will flow out from the corner of the mouth involuntarily, which is commonly known as' drooling ', especially in 1-2-year-old children Saliva is a normal physiological phenomenon, parents don't have to worry about it. After 2 years old, children's swallowing saliva function will gradually improve, and this phenomenon will naturally disappear.
Saliva is acidic and contains some digestive enzymes and other substances, which can stimulate the skin. Therefore, for children who often drool, parents should often wipe the saliva from their mouth, wash it with warm water, and then apply oil to protect the skin of chin and neck. It's better to put a bib around the child to prevent the saliva from polluting the clothes. The handkerchief for children to wipe saliva should be soft and cotton. It should be washed and ironed frequently. Do not use force when wiping. Gently wipe the saliva dry to avoid damaging local skin.
Morbid drooling is called 'sialopathy', which is mostly caused by nervous system diseases, such as encephalitis sequelae, bulbar paralysis, cerebral palsy, facial paralysis, etc. it is caused by swallowing dysfunction in children, so the primary disease should be treated at this time. In addition, when children suffer from stomatitis and gingivitis, salivary gland secretion increases due to inflammatory stimulation, leading to salivation, and can have a bad smell; when children suffer from pharyngeal herpes and tonsillitis, children dare not swallow due to swallowing pain, which will also make children temporarily salivate, but with the recovery of the primary disease, salivation will stop