Sleeping on the body especially itchy, common causes are mosquito bites, scabies, hives and so on. 1. Mosquito bites: If you are bitten by mosquitoes at night, the toxins of mosquitoes are injected into the human body under the skin, which can cause the skin to produce an allergic reaction, resulting in a particularly itchy body. 2. Scabies: Scabies caused by scabies mite infection, due to the habits of the scabies mite’s nocturnal activities, there will be a special itchy phenomenon on the body at night sleep, resulting in a special itchy body. 3. Urticaria: If you suffer from urticaria, itself because the body produces an allergic reaction, the release of histamine and itchy skin, people sleep at night, the vagus nerve excitability increases, can aggravate the itching, so will sleep on the body especially itchy. If you sleep on the body is particularly itchy, to go to the regular hospital to identify the cause of the disease in a timely manner, and under the guidance of a professional doctor to choose a suitable method of treatment, do not self-medication.