The young mother Wu rushed her 6-month-old son to the hospital yesterday, so that the dermatologist could help diagnose what the child had gotten? The doctor learned that the mother found a large red spot on her baby’s bottom when she changed his diaper this morning and thought he was suffering from infant eczema. The doctor took a careful history and told her it was actually diaper eczema. Diaper eczema, also known as neonatal “red buttocks” or “buttock rash”, is a common inflammatory skin lesion in newborns. It’s mostly seen in infants and children with diarrhea, incontinence, malnutrition, vitamin deficiency, and low immunity, and is easily flushed or even broken when stimulated by external adverse factors such as urine and urine. The main manifestation is an allergic reaction in which the child’s skin becomes red when it touches the area of the diaper, such as the buttocks. In the case of diaper rash, the skin becomes red, or a small papule appears, or even ulcerates and runs. In mild cases, the rash is erythematous, papular, and swollen, and in cases of delayed treatment, the rash may fuse into patches with blisters, vesicles, itching, and sometimes secondary bacterial or fungal infections. Diaper eczema is an inflammation of the buttocks caused by the stimulation of the baby’s delicate skin by wet diapers for a long time and the irritation of the skin by ammonia produced by the bacterial decomposition of urea in urine or feces. In recent years, with the application of disposable diapers, the incidence of diaper rash has been on the rise. Due to the rich vascularity of the skin of newborns, the vigorous secretion of sebaceous glands, the many metabolic products of the skin, and the delicate skin, the imperfect mucosal barrier, the incomplete keratinization of the skin, and the poor resistance, due to diarrhea or untimely diaper replacement, the bacteria decompose the urea in stool and urine into ammonia to stimulate the skin. If the baby uses wet diapers, diapers stained with urine and faeces and diapers not washed with soap and laundry detergent, irritation of the skin in the diaper area can make the condition worse. Some parents do not change diapers for fear of affecting their baby’s sleep, but in fact, babies sleeping on wet diapers are not only prone to dermatitis, but also sleep very uncomfortably and restlessly. And this situation is more obvious in the summer when the weather is hot. When parents choose diapers for their babies, they should try to avoid using coarse cloth or plastic cloth to directly wrap the affected child’s buttocks, it is best to use soft, absorbent, good quality disposable diapers or use cotton cloth to make diapers, and diapers should not be pockets too tight. Change diapers regularly, and wash and dry them in the sun before applying them. Urinate diligently so as not to soak the skin with urine. Pay attention to the hygiene of your family members to prevent secondary infection and cross-infection, wash your hands before and after touching the affected child, and take good care of your skin. Once diaper eczema occurs, the key is to keep the buttocks clean and dry to prevent infection and promote healing of the trauma. When diaper rash is severe, temporarily do not use diapers and only pad the child’s buttocks to expose them to the air. After each urination or defecation, wash the buttocks with warm water, dry them and apply tannic acid ointment, buttock cream, heated and disinfected vegetable oil that has been cooled for use, etc. If the rash breaks out, send your baby to a dermatologist promptly.