The phenomenon of pain during erection may be related to penile sclerosis, indulgence or frequent masturbation, trauma and other diseases. 1. Sclerodactyly: it is a benign lesion, which is caused by the fibrous scars formed in the corpus cavernosum and tunica albuginea of the penis, and in the clinic, it can be manifested as hardening of the penis, curvature of the penis, shortening of the penis, and even pain on erection and erectile dysfunction, and so on. The cause of sclerodactyly is not only related to the scar caused by trauma, but also may be related to genetic and environmental factors. 2. Indulgence or frequent masturbation: Indulgence or frequent masturbation, the penis repeated frequent congestion and erection, local tissue edema stimulation of sensory nerves will appear after erection pain. 3. Trauma: If there is penile trauma, the symptoms of erection pain may occur. In addition, there are many other reasons that can cause erection pain, due to the complexity of the condition, the specific circumstances need to ask the doctor for an interview.