Bitten by a mosquito with red marks is the body’s normal reactive response, generally red marks in 3 days can subside on their own, due to individual differences, the treatment program is different, such as redness, swelling, blisters and other reactions to the patient can be appropriate use of glycerite lotion, anti-infective ointment, glucocorticoid ointment and so on. After being bitten by mosquitoes mosquitoes will inject toxins into the skin, inducing a skin immune response, causing local capillary expansion, erythema, oozing and so on. Under normal circumstances through the body’s metabolism, the expansion of the capillaries will gradually return to normal, the exudate is gradually absorbed, therefore, most of the red marks will subside in about 3 days. Because of the existence of different physique, individual differences, some people local skin allergic reaction is heavier, the bite appeared red and swollen plaques, and even developed into blisters, can be accompanied by pain, itching. Generally, local topical glycerine lotion, ofloxacin gel, erythromycin ointment and other anti-infective ointment, mometasone furoate ointment, hydrocortisone ointment and other glucocorticosteroid ointment can be applied. If the mosquito bite appears red marks continue to fail to relieve, with pain, redness and swelling intolerable and other serious symptoms, timely to the hospital dermatology department to avoid aggravation of the infection, and comply with the doctor’s instructions for treatment.