If your child’s bottom is red, you should first find out the cause of the redness. If it is caused by wearing diapers, then you need to change the diapers and keep them dry. If it is caused by diarrhea, it is recommended to take oral medication such as montelukast and probiotics as soon as possible and check the stool routine to find out the cause of diarrhea and then remove the cause for treatment. It may also be caused by constipation, when the body is too hot, the gastrointestinal tract has heat, constipation will occur, it is recommended to drink more water, eat more fruits and vegetables to improve the constipation situation. When constipation is improved, the red buttocks may disappear naturally.