In summer, red bumps on the legs and itchy consider mosquito bites, summer dermatitis, etc., the main treatment is medication, according to the cause of the selection of appropriate drugs. 1. Mosquito bites: mosquitoes are more in summer, if the mosquito bites will appear after the red bumps, you can follow the doctor’s instructions to apply hydrocortisone butyrate, trimethoprim and other glucocorticosteroid drugs treatment. 2. Summer dermatitis: summer dermatitis is a seasonal skin disease caused by hot weather, there will be bilateral shin front of the erythema, corn size pimples, papules, the main treatment is to maintain ventilation and heat, pay attention to the temperature of the room, avoid wearing tight clothes, the local use of glycerine lotion or glucocorticoid drugs to relieve itching. Many kinds of diseases can cause red bumps and itchy legs in the summer, you should consult the doctor in time, if you need treatment, you should follow the doctor’s prescription medication, avoid self-medication.