The most common cause of erectile dysfunction and arterial stenosis is psychosomatic factors, but it can also be caused by erectile dysfunction and arterial stenosis. 1. Spiritual and psychological factors: may be due to the usual work pressure is relatively large or mental tension, resulting in a continuous state of anxiety, it will affect the erection of the penis during sex, if you can not relax the spirit of sex, there will be the phenomenon of hard not to get up. 2. Erectile dysfunction: i.e. impotence, which refers to the inability of men to consistently obtain or maintain sufficient penile erection, and may be caused by frequent masturbation, trauma, and so on. 3. Arterial stenosis: mostly seen in diseases such as diabetes or high blood pressure, which can easily lead to changes in the penile arteries and narrowing of the arteries, thus affecting penile erection. It is recommended to adjust the psychological state, avoid mood tension, excessive pressure, if necessary, can go to the hospital, identify the causes and then targeted treatment.