Itchy and swollen skin after mosquito bites in summer, can be routinely used cool oil, etc., if ineffective can be given in accordance with the insect bite dermatitis drug treatment. Usually, the use of mosquito bites such as cool oil can be better relief of redness, swelling, itching and other symptoms; if the mosquito venom causes local burning sensation, redness and swelling and other symptoms of allergic reaction is obvious, it is recommended that the use of glycerite lotion, Dinaid ointment and other topical medications to carry out local anti-allergy, anti-itching and other treatments. Special attention should be paid to the fact that severe insect bite dermatitis or allergic reaction accompanied by widespread redness and swelling may require a combination of oral medications on top of the topical medications, including Benadryl, Dexamethasone and other medications. The above medications need to be used under the supervision of a physician.