Baby was bitten by a mosquito bag, it may be because the mosquito bite after the formation of local inflammatory reaction, sometimes this bag is a windbag-like. Early without blisters, you can use glyburide lotion for external application. If the inflammation is more obvious, and even blisters, try to use 3% boric acid solution, saline cold compresses. If the redness and swelling worsens further, or even if there is fluid exudation, you need to use Denide cream, Eloson cream (Eloson ointment) for external application, 2-4 times a day.