Diaper dermatitis, also known as “diaper rash” or “infant red bottom”, is an acute irritant skin inflammatory reaction that occurs in the diaper area (buttocks, vulva, belly, thigh root and other diaper-covered areas) and is one of the most common skin diseases of infancy. Diaper dermatitis is not all about the diapers themselves, but the onset of diaper dermatitis is related to the heat, humidity, friction and fecal irritation of the skin in the diaper area. The skin of infants is delicate, the skin cells are small and thin, the resistance to various stimuli of the external environment and the ability to store water and moisture are weak, when subjected to friction or stimulation is easy to produce inflammation. Infant cell connection function is weak, diaper and other friction will lead to baby skin easily broken. At the same time, the diaper area is a more closed, hot and humid environment, even the most absorbent diapers will make some urine residue on the baby’s delicate skin, so the skin in the diaper area is easily in a damp impregnated state. If diapers are not changed in a timely manner, it can make your baby’s little butt more stuffy and moist, which can lead to bacterial and fungal infections and induce or aggravate diaper dermatitis. If the diapers are not changed in time, the urease in the feces will catalyze the decomposition of the urea in the urine to produce ammonia, which will raise the local skin pH to alkaline, and the alkaline environment will activate the activity of protease, lipase and urease in the feces, which will aggravate the irritation of the skin and further damage the skin barrier. If your baby has diarrhea, the bacteria in the intestinal tract can proliferate rapidly in a hot, humid environment, aggravating the dermatitis. The key to preventing diaper dermatitis is to keep the little buttocks clean and dry. As much as possible, let your baby’s buttocks be exposed to the air for a longer period of time so that your baby’s buttocks can often stay dry and reduce the friction of diapers and diapers on the skin. It is best to choose soft, clean and breathable diapers for your baby. Change diapers and diapers regularly. Change diapers and diapers immediately after each urination and defecation, once in 1-3 hours during the day and at least once at night. In summer or when your baby has diarrhea, you can increase the number of changes. Pay attention to cleanliness, wash with water after each poop, should not use soap, should not use wet wipes containing alcohol, fragrances and other stimulants scrubbing. After cleaning, apply some buttock cream to your baby to form a protective film to reduce friction, isolate irritants such as urine and stool to stimulate the skin and repair the skin barrier.