Long red bumps on the body is itchy like mosquito bags are very painful, considered due to insect bite dermatitis, urticaria and other factors, according to different diseases to choose the appropriate drug treatment. 1. Insect bite dermatitis: caused by mosquito bites, can occur throughout the year, more common in summer and fall. Oral antihistamines, such as loratadine and cetirizine. Topical antipruritic agents, such as glycerite lotion, zinc oxide, camphor cream or topical glucocorticoid such as Dinocap, etc. can be used. 2. Urticaria: patients are mainly manifested as local wind or angioedema, surrounded by reactive redness, accompanied by pain, itching and other symptoms. To avoid contact with sensitizers, you can also use topical glycerite lotion, oral loratadine, cetirizine and other antihistamines to achieve anti-allergic effect. Red bumps on the body is itchy like mosquito bags are very painful may also have other reasons, it is recommended that patients go to the hospital in a timely manner, early formal treatment, not blindly use drugs.