How does the child sleep drool at night to return a responsibility

Children drooling when sleeping at night may be caused by unhygienic oral hygiene in children, or may be caused by abnormal conditions such as anterior tooth deformity, neuroregulation disorder, digestive dysfunction, and spleen and stomach disharmony. Children need to actively brush their teeth and keep their mouths clean. If the child drools frequently at night, family members need to take the child to the hospital for examination.