人嘴唇发干时,用舌头舔嘴唇,只能通过唾液使嘴唇得到短暂的湿润。唾液中含有淀粉酶、黏液素等物质,比较黏稠,会引起结缔组织的收缩,导致唇黏膜发皱,造成“越舔越干,越干越舔,越舔越裂”的恶性循环。同时,表面的水层蒸发,也很容易带走嘴唇内部的水分。所以嘴唇发干时可涂少量麻油、甘油或 People dry their lips, tongue licking their lips, lips can only be moistened by moistens. Saliva contains amylase, mucin and other substances, more viscous, can cause contraction of connective tissue, leading to lip mucosa wrinkles, resulting in “the more licking the more dry, the more dry the more licking, the more licking the more crack ” vicious circle. At the same time, the surface of the water layer evaporation, it is easy to take away the moisture inside the lips. So when dry lips can be coated with a small amount of sesame oil, glycerin or