Itchy body at night sleep may be hives, neurodermatitis and other diseases lead to. 1. Urticaria: If the night before going to bed contact with dust mites, animal fur and other allergens, or environmental temperature changes, can induce urticaria appear. It causes itching of the skin, followed by the appearance of the wind, the wind is bright red, pale white or skin color. 2. Neurodermatitis: characterized by paroxysmal itching and mossy skin, it may be associated with neuropsychiatric factors such as depression, fatigue, poor sleep, etc. Local stimuli such as woolen fabrics can also be induced. The disease is often exacerbated by local irritation and mental agitation, and is obvious at night. It is recommended to actively go to the regular hospital, so as to clarify the cause of the disease, and then targeted treatment.