Itchy body at night, mostly due to allergies, chronic or acute skin diseases, and their own internal diseases. 1. Allergies, if the allergic body, it is easy to lead to the situation, and at night the hormone level is lower, itself easy to allergy, in addition, if there are other allergens such as insects on the bed sheets, will also cause the symptoms. 2. Chronic or acute skin diseases, such as chronic eczema or urticaria, as well as dermatitis and other diseases caused by cold stimulation at night, can also cause this performance. 3. Internal diseases, if you suffer from severe diabetes, leukemia or rheumatic immune diseases, can also lead to itchy skin and other manifestations. Itchy body at night is recommended to consult a regular hospital in a timely manner, to clarify the cause of the disease, and then follow the doctor’s instructions for targeted treatment.