Why does the skin itch at night and is fine during the day?

Itchy skin at night is fine during the day, it may be caused by physiological reasons, such as environmental factors, etc.; it may also be caused by pathological reasons, such as urticaria, scabies and other diseases.
1. Physiological reasons: may be due to the night living environment and daytime is different, for example, the night environmental temperature is too high, may lead to dry skin, resulting in itching.
2. Pathologic causes:
(1) urticaria: the disease is an allergic reaction caused by ingestion or contact with allergens, if the patient is allergic to the dust on the bed sheet, dust mites, animal dander, etc., the patient did not come into contact with these allergens during the day, and after sleeping at night after contact, it will appear itching symptoms throughout the body, often accompanied by the presence of different sizes of the air masses and so on.
(2) Scabies: This disease is an infectious skin disease caused by scabies mite parasites in the epidermis, and will appear in the patient’s finger cracks, umbilical cord, genitals and other delicate parts of the skin pimples, papules, accompanied by intense itching. The patient may concentrate on the daytime, did not notice the itching, due to scabies often in the night activities, so will be conscious of severe itching at night.
It is recommended that patients with symptoms of itchy skin at night and nothing during the day go to a regular hospital in a timely manner, after a clear diagnosis, under the guidance of the doctor to receive standardized treatment.