Penis a burst of pain, there are the following reasons: 1, the most common is the symptoms of infection, such as sex or masturbation, resulting in a urinary tract infection, the penis because of infection, it will be a burst of pain; 2, there are also symptoms of sclerodactyly, sclerodactyly is in the back of the penis, touch one or a few clearer hard bars, the penis erection will be a burst of pain; 3, patients with foreskin, because the glans is wrapped by the foreskin for a long time, when erected, the foreskin pressure glans, will also lead to a burst of pain in the penis; 4, patients with hyperextremity, hyperextremity of the foreskin leads to foreskin scale stimulation of the glans, the urethra, which will lead to a burst of pain in the penis.