Mosquito bites after redness and swelling can be cleaned with soap and water, cold compresses or applying drugs and other ways to treat. 1. Soap and water cleaning: mosquitoes will leave some venom after biting, so that the bite site redness, swelling, itching and other discomforts, and these venom is generally acidic, the use of soap and water, alkaline substances, can make the neutralization of acid and alkali, thus playing the role of itching, swelling. 2. Cold compress: available towels wrapped in ice, or use ice packs on the local cold compress for about 15 minutes, cold compresses can make the local capillary contraction, play a rapid swelling and itching effect. 3. Apply drugs: you can use glucocorticoid-containing ointment, including mometasone furoate cream, halometasone ointment, etc., which has strong anti-inflammatory and swelling effects. If the local breakage, you can externally rub fusidic acid cream, mupirocin ointment, etc., which can disinfect and prevent secondary bacterial infection. The redness and swelling after mosquito bites can be treated in the above ways, and the symptoms persist and have not improved, you should go to the hospital in time for treatment, and do not use your own medication indiscriminately, so as not to aggravate the condition.