There is a blister after the mosquito bite, consider the production of an allergic reaction caused by insect bite dermatitis. Mosquito bites skin secretions will enter the skin bite stimulus, but also to the skin irritation, will lead to localized allergic reaction, some appear skin redness, swelling, itching; some will cause blisters, itching and other symptoms. Baby skin is delicate in infancy, it is easier to get blisters after being bitten by mosquitoes; the second is that patients with allergies are more sensitive to the secretions of mosquitoes, and the chances of getting blisters will be greater. Blisters after mosquito bites, you should keep the skin clean and hygienic, smaller blisters can be cold compresses, followed by external glucocorticoid drugs, such as hydrocortisone ointment, tretinoin cream, etc., itching is serious, take cetirizine chlorpheniramine and other antihistamine drugs. After being bitten by a mosquito, there is a blister, it is recommended to go to the hospital in time to check, follow the doctor’s instructions for treatment.