How does the skin rise red a knot very itch to do

1, allergy caused by skin redness and itching, first of all to find suspected allergens. And away from allergens, the affected area rubbed calamine lotion, oral diphenhydramine, chlorpheniramine maleate tablets and other anti-allergic drugs itching. 2, due to mosquito bites caused by skin redness and itching, wash the affected area with soapy water, can neutralize mosquito secretion in the skin acid venom, so that itching symptoms alleviate or disappear. Wear long-sleeved light-colored clothes when going out in summer, try not to move in places with many aquatic plants, use mosquito nets on beds, put mosquito coils indoors, bathe frequently to keep skin clean, and prevent or reduce mosquito bites.