Many diseases can cause the body long red dots itchy phenomenon like mosquito bags, such as mosquito bites, urticaria, nodular itchy rash. 1. Mosquito bites: mosquito bites on the body, will cause local skin allergic reactions, similar to mosquito bags like bumps, may also cause pimples, papules, etc., most of them will be accompanied by itching. 2. Hives: red dots on the body itch like mosquito bags may also be hives, hives and many factors related to, such as drugs, respiratory inhalants, food, the environment, etc., can be manifested in varying sizes and shapes of the wind, accompanied by itching. 3. nodular itchy rash: nodular itchy rash may be related to gastrointestinal dysfunction, insect bites, the early stage will show the size of rice grains of red pimples, presenting the skin surface elevated nodules, pimples, at the same time will be accompanied by itching, resulting in the phenomenon of the body with a small red dots itchy like mosquito bags. The cause of the red dots itchy like mosquito bags on the body of many reasons, if the itching is more serious, it is recommended that patients go to the hospital in time to improve the examination, in accordance with the doctor’s instructions to take standardized treatment.