The night erection in the morning without erection may be caused by physiological factors, psychological factors, disease factors and other reasons. 1. Night erection morning not erect if there is no urinary frequency, urinary urgency and other abnormal symptoms, and does not affect the normal erection, ejaculation, as well as sexual life, generally belong to the normal physiological performance. 2. The evening after work mental relaxation, have psychological desire, and morning work emergency, no desire, may lead to night erection morning not erect. 3. Too much fatigue or frequent sexual intercourse leads to the patient’s physical weakness or induces erectile dysfunction and other diseases, which may also lead to the night erection in the morning without erection. It is recommended to go to the hospital to rule out the factors of the disease, targeted treatment.