What is the reason for the baby's red butt and surrounding skin?

Patient's question:

My baby is two and a half months old. Recently, I noticed that my baby's bottom is particularly red, but I haven't been eating spicy food. My baby has a bowel movement once or twice a day, and I rinse with clean water after each bowel movement. I've been using diapers all along. What could be causing the redness, and is there a solution?

Doctor's answer:

Medical Analysis: Hello! I think your baby's condition might be diaper rash, which is clinically referred to as diaper dermatitis. It is caused by infrequent diaper changes, being soaked in urine and feces, and the formation of ammonia from fecal matter as bacteria break down urine, producing a significant amount of ammonia that irritates the skin.
Advice: Keeping the area dry can help prevent this condition. Change diapers frequently, maintain cleanliness and dryness in the baby's external genital area. Choose diapers with soft, highly absorbent material. When washing, ensure the soap is thoroughly rinsed off. Apply talcum powder, zinc oxide ointment, or calamine lotion externally. For ulcers or severe erosion, use wet compresses with a 3% boric acid solution. I hope my answer is helpful to you!

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