Redness in baby’s anus can be improved by general treatment and medication for causes including allergy, diarrhea, inflammation and other causes. 1. Allergy: Redness in the anus may be caused when the baby is allergic to diapers. It is recommended to stop using or change diapers and keep the buttocks dry and clean. You can also apply topical glycerin lotion and other medications to improve the symptoms. 2. Diarrhea: prolonged diarrhea excretion will stimulate the anus to cause redness in the anus, it is recommended to maintain a clean and hygienic diet, if necessary, you can use drugs such as montelukast to treat diarrhea. 3. Inflammation: pathogenic bacteria infection will stimulate the anus to cause redness in the anus, according to the type of infection to take such as metronidazole, amoxicillin clavulanate potassium and other drugs to control inflammation. So after the baby redness in the anus, it is recommended to go to the hospital in time to identify the cause of the disease, under the guidance of the doctor to receive standardized treatment. The above drugs need to be used in accordance with medical advice.