Red and drowned underarms in babies are medically known as intertrigo rash, which is redness or ulceration of the skin in the area of good sweating. At present, you can wash, keep the wound dry and medication to promote the child to return to normal. 1. Cleaning: Especially in places where the child can’t easily dissipate heat, such as armpits, thighs, neck, and so on. Normally, we should pay attention to wash these places more often, which is conducive to heat dissipation. 2. Keep the wound dry: after cleaning, pay attention to use a towel to dry the skin of the drowned red place. Keeping the wound as dry as possible can avoid further aggravation of the situation. 3. Drug treatment: If there is local oozing or erosion, 3% boric acid solution can be used under the guidance of the doctor, or if necessary, it can be used externally as prescribed by the doctor to Dinaid cream. Usually must pay attention to the child’s skin protection. If the problem is serious, you should go to the pediatrician or dermatologist in time and take reasonable measures under the guidance of the doctor.