Infants with red skin around the anus are considered to be related to factors such as not paying attention to hygiene, using diapers for too long, and allergies. It is recommended to pay attention to local hygiene, change diapers frequently, and give medication if necessary. 1. Don’t pay attention to hygiene: Usually, there is no cleaning after bowel movement, and the stimulation of bowel movement can lead to redness around the anus. It is recommended to pay attention to hygiene, wash with lukewarm water after defecation, and dry the area with a clean tissue, the symptoms can be gradually reduced. 2. Use diapers for a long time: If you use diapers for a long time and don’t pay attention to changing them, the infiltration of urine and feces can lead to local skin redness. It is recommended to change the diaper diligently to reduce the undesirable stimulation. 3. Allergy: the stimulation of urine and feces can lead to localized eczema, urticaria and redness around the anus. If necessary, give glycerin lotion topical application to help relieve symptoms. It is recommended to keep the local area clean, dry and moist. If necessary, go to the hospital pediatrics, dermatology, combined with the doctor’s advice medication.