孩子整天流口水,称流涎症,给家长带来很多麻烦与苦恼。常见于婴幼期,原因很多,有生理和病理等因素。新生儿时期的唾液腺发育较差,因而唾液分泌很少,口腔粘膜较干燥。到出生3～4个月时,唾液分泌开始增多,5～6个月后显著增加。婴儿4～10个月乳牙萌出刺激三叉神经,亦使唾液分泌增多。由于婴儿口腔深度不够,又不会及时吞咽过多的唾液,故常发生流涎,属生理现象。随着年龄的增长,口腔的深度逐渐增加,婴儿能吞咽过多的唾液,流涎自然消失。病理因素的流涎仅见于幼儿期,学龄期也常见到,常见病因为口 Children drooling all day, called salivation, to parents a lot of trouble and distress. Common in infancy, for many reasons, there are physiological and pathological factors. Neonatal salivary gland development is poor, so little saliva secretion, oral mucosa is more dry. 3 to 4 months after birth, salivary secretion began to increase, 5 to 6 months after a significant increase. Infant 4 to 10 months of primary teeth to stimulate the trigeminal nerve, but also to increase the secretion of saliva. As the baby’s oral depth is not enough, but will not swallow too much saliva, it often occurs salivation, is a physiological phenomenon. With age, the depth of the mouth gradually increased, the baby can swallow too much saliva, salivation naturally disappear. Pathological salivation only seen in early childhood, school age is also common, the common cause is the mouth