After the mosquito bite, the local appear obvious swelling belongs to the allergic reaction. That is, the child’s physique is relatively special or the bite of the mosquito is special, the body more to the venom released by the mosquito, toxins have a transient allergic reaction, and the local reaction will be relatively large. At this time, if the swelling is obvious or have obvious scratching itching performance, you can carry out the appropriate anti-allergy treatment. For example, oral antihistamines, such as loratadine, cetirizine or paracetamol, are commonly used. Individual babies with particularly pronounced swelling and scratching combined with local infection may need anti-infection treatment with antibiotics. When the swelling is not well controlled, it may be necessary to give vitamin C and hormonal drugs by infusion for anti-allergic treatment of greater strength.