Erectile dysfunction mainly refers to the lack of hardness after erection, which affects the quality of coitus, and erection at night, indicating that there is no obvious organic lesion. The main causes of erectile dysfunction include overwork, chronic prostatitis, abnormal hormone levels and psychological factors. 1. Excessive fatigue: Long-term physical fatigue, low nerve excitability, will cause the corresponding situation. 2. Chronic prostatitis: Chronic prostatitis can lead to prolonged discomfort in the pubic area, abnormal urination, and also indirectly affect the erection. 3. Abnormal hormone levels: Male erections are regulated by androgen levels, and some men have lowered testosterone levels, which can cause related symptoms. 4. Psychological factors: Most of them are caused by psychological pressure after occasional unsuccessful intercourse, resulting in a kind of reflexive decline in erectile status. Erectile dysfunction, has not been able to improve, you need to consult a doctor in a timely manner, under the guidance of the clinician for standardized treatment.