Newborn babies have frequent diarrhea and bowel movements, the skin around the anus is delicate, and if the diaper is not changed in time, the wet diaper can lead to poor air circulation and a red and swollen buttocks. In this case, first keep the abdomen warm and avoid getting cold, you can apply external umbilical patches or local hot compresses. Take probiotics orally to adjust the intestinal flora and improve the symptoms of diarrhea. After each bowel movement and urination, wash the buttocks with warm water, dry the water after washing, keep the buttocks dry and apply hip oil. And changing clean diapers or diapers in time can improve this symptom.