The baby suddenly developed red rash on his abdomen.

Baby abdomen suddenly showed red rash, the most common case is insect bite dermatitis, also known as papular urticaria. Mainly because the baby's skin is relatively thin and tender, easy to be insect bites caused by skin allergic reactions. Insect bite dermatitis, seasonal characteristics, more common in summer and autumn, due to different insect species and different mechanisms of reaction, can cause different skin reactions at the bite, generally showing red edema papules and wheals, with small blisters in the middle, peanut size. Good hair in the abdomen, itching obvious, more multiple, isolated, can be locally applied calamine lotion.