Itchy blisters and yellow water after mosquito bites may have insect bite dermatitis, which can be treated with topical corticosteroid preparations (Dinocaprolactone cream) and oral antihistamines (loratadine) under the guidance of a doctor. 1. Mosquito bites may cause localized skin allergic reaction and inflammatory reaction, called insect bite dermatitis, which may manifest itself in the form of erythema, blisters, pus, etc., and may be accompanied by intense itching, usually lasting for about a week. 2. Under the guidance of a doctor, topical medications can be used, including corticosteroids such as dieldrin cream, hydrocortisone cream, etc., accompanied by local infections can be used mupirocin ointment, etc., itching is obvious can be combined with oral loratadine and other relief symptoms. If the skin symptoms after mosquito bites are obvious, it is recommended to go to the hospital in time, and follow the doctor’s instructions for treatment.