Men’s erection is not soft generally belongs to the normal physiological phenomenon, but if there is excessive erection and too many times, it belongs to abnormal erection of penis, which may be caused by penile cancer, epilepsy and other diseases, and it is necessary to consult the doctor in time to find out the cause of the disease. 1. Physiological phenomenon: Generally speaking, when young people are sexually aroused and stimulated, they may have erections and hardness, which is a normal physiological phenomenon and can be relieved by themselves. 2. Pathological factors: (1) Penile cancer: in patients with penile cancer, when there is direct infiltration and retroperitoneal fibrosis, it can compress blood vessels and block venous return of penis, thus leading to abnormal erection of penis, accompanied by emaciation, anemia, swelling and ulceration and other manifestations. (2) Epilepsy: epilepsy is mainly caused by excessive discharge of neurons in the brain, and patients with epilepsy can affect the erectile center of the nervous system, resulting in the manifestation of abnormal erection, which is usually accompanied by other symptoms such as impaired consciousness and tonic-clonic seizure. In addition, some antidepressants, sedatives and other drugs, as well as pelvic infections and other diseases can lead to abnormal erection of the man’s penis is not soft, you should promptly consult a doctor to clarify the cause of the disease, and then give targeted treatment.