Red farts, medically known as diaper dermatitis, is a common skin condition in infants and children, often caused by improper care and irritation of the skin by urine. The symptoms of diaper dermatitis can be improved by daily care, but in serious cases, medication is needed under the guidance of a doctor. I. Daily care: 1. Infants need to clean up immediately after defecation or urination to avoid diaper dermatitis caused by the stimulation of urine and stool, and to keep clean and hygienic after cleaning; 2. After using diapers with contact allergies, replace diapers or completely use cotton diapers for care; 3. Adults need to pay attention to their own hand hygiene when cleaning or replacing to avoid secondary infections in infants’ bottoms; 4. When cleaning the buttocks, try to avoid using wet wipes or paper towels to wipe it, rinse it with running water, and avoid washing the affected area with soapy water or hot water. 2.Medication: 1.Apply topical comfrey oil and trimethoprim cream according to doctor’s prescription, trimethoprim cream is generally used for no more than 1 week; 2.If local exudation is obvious, use saline or boric acid solution for cold and wet compresses; 3.After the buttocks are dry, apply tannic acid ointment, zinc oxide oil or prickly heat powder according to doctor’s prescription, which can dry the trauma and help regenerate the epidermis.