Baby in the mosquito bite after the local can have red, swollen, hard nodules appear, individual physical special baby, or by a special kind of mosquito bite, the local reaction is stronger, there are obvious redness, swelling, infiltration or hard nodules, and even blisters. This is due to the release of special insect venom, resulting in strong local skin allergic reactions in babies, especially allergic babies will react more strongly. When the area is repeatedly scratched and rubbed, it will further form blisters and promote the appearance of blisters. Treatment can be topical zinc oxide ointment or combined with oral cetirizine or loratadine for anti-allergic treatment, requiring a visit to the dermatologist if necessary.