Mosquito bites ulcerated yellow water may be an allergic reaction caused by insect bites, available boric acid solution or saline wet compresses and topical glucocorticosteroid ointment. If combined with bacterial infection, antibiotic treatment is required. Insect bite dermatitis caused by allergic reactions, easy to appear pimples, blisters, blisters can flow after rupture of yellow water, you can use boric acid solution or saline wet compresses after a short period of time topical glucocorticoid ointment, such as hydrocortisone cream and so on. Oral glucocorticoids are needed if necessary. Mosquito bites if scratching, easy to cause infection, often due to bacterial infection, can use iodophor to disinfect, at the same time need to use antibiotic ointment treatment, such as erythromycin ointment, mupirocin ointment and so on. In severe cases, oral antibiotics are required. If the symptoms of mosquito bites are serious, go to the hospital in time, the use of the above drugs should pay attention to follow the doctor’s instructions.