Children’s mouth cracked rotten may be bad habits, lack of vitamins, bacterial infection and other factors. 1. Bad habits: children’s mouth cracked rotten may be caused by bad habits, due to the dry climate, will cause dry lips, the patient will have the habit of licking lips, serious mucous membrane cracking will occur. 2. Lack of vitamins: children’s mouth cracked rotten may be caused by lack of vitamins, because the patient usually often have partiality, picky eaters, anorexia, so that the body lacks vitamins and other vitamins, prone to the phenomenon of cracked lips. 3. Bacterial infection: children’s mouth cracked rotten may also be caused by bacterial infection, due to Candida albicans, Staphylococcus aureus or streptococcus bacteria, etc. caused by keratitis, the children will appear in the case of mouth cracking. When children’s mouths are cracked and rotting, it is recommended that parents take their children to the hospital in a timely manner to clarify the cause of the disease and follow the doctor’s instructions, to avoid blindly using their own medication.