The following two conditions should be noted when the child sleeps with a bad taste in the mouth: first, the child may have indigestion. Dyspepsia can be nausea, vomiting, abdominal pain, bloating, diarrhea, poor appetite, bad breath, etc., can be taken orally to wake up the spleen and nourish the child particles or gastric elimination of oral solution for symptomatic treatment, and pay attention to strengthen the dietary care, the recent let the child to eat light, easy to digest food. Secondly, children should pay attention to brushing their teeth. If the child did not brush his teeth in time, the food residue in the mouth can cause odor in the mouth during sleep, so after the child erupted the first teeth, all should be routinely brushed.