Itchy pubic skin at night may be caused by physiological factors such as not paying attention to hygiene, or it may be caused by diseases such as scabies, pinworms and urticaria. 1. Physiological factors: If you don’t pay attention to personal hygiene and don’t wash the local area at night, it may trigger bacteria to adhere to the local area, which may lead to itchy pubic skin at night when you sleep. 2. Scabies: the cause is mainly related to the scabies mite parasites in the human epidermis, the patient may appear pimples, small blisters, itching and other symptoms, usually in the night itching will be aggravated, some patients may sleep in the pubic skin itchy situation. 3. Pinworms: the cause is mainly caused by pinworm parasites in the human intestinal tract, patients in the perineum and around the anus will appear strange itchy situation, night itching is particularly obvious. 4. Urticaria: the cause may be related to food, infection, drugs and other factors. Typical manifestations of the skin will appear in different sizes, varying numbers of wind, accompanied by itchy symptoms, may be all day or intermittent episodes, the disease can occur in all parts of the body surface, if you suffer from urticaria, there may be the phenomenon of itchy pubic skin at night sleep. There are many reasons for the itchy pubic skin at night, after excluding physiological factors, it is recommended to go to a regular hospital for examination and clarification of the cause of the disease, and follow the doctor’s instructions for treatment.