Blisters generally refers to blisters, the baby was mosquito bites blisters ulcers are mostly considered to be caused by insect bite dermatitis, need to take medication, general measures. 1. medication: children who are inadvertently bitten by mosquitoes, not ulcerated, you can choose to use topical glucocorticoid drugs, such as hydrocortisone cream; and glycerine lotion topical, can play an anti-inflammatory, anti-itching effect. Oral antihistamines such as cetirizine hydrochloride can also be used if the itching symptoms are obvious. If the skin ulceration is secondary to bacterial infection, antibiotic ointment such as mupirocin cream can be applied externally, and oral antibiotic drugs such as roxithromycin and cefixime can be taken for severe cases. 2. General measures: During the treatment period, children should avoid scratching the skin lesions to avoid secondary infection, resulting in prolonged course of the disease. At the same time, they should prevent being bitten by mosquitoes again. When going out, wear long pants and long sleeves. If the baby develops blisters and ulcers after mosquito bites, parents need to bring the child to the hospital to find out the cause of the disease.