Curvature or bending of the penis ventrally (down toward the thighs), laterally (toward either side), or dorsally (back toward the body) during erection, although uncommon, may be very disturbing to the patient. It may be associated with pain, difficulty of penetration, and sometimes ED.
If a bend or curve has been present since birth, it may be due to an abnormal attachment of the penile skin or the subcutaneous fascia (tissues beneath the skin) or to abnormally short corpora cavernosa, both of which can be corrected surgically with excellent results. In adults, the most common cause of painful penile curvature or bending is a condition called Peyronie's disease. Ventral bending, in particular, can also be acquired through a fracture of the penis or some other form of trauma to the genitalia.
Application of the term fracture to the penis may not be fully justified, but it is accepted and used by the medical community for lack of a better description. In most of these unfortunate cases, a man with a full erection, during intercourse or even during sleep, has hit his penis on a solid object or flexed it acutely while rolling in bed. There is usually a crackling sound accompanied by pain, loss of erection, and penile swelling, with a reddish or bluish discoloration; these are due to a rupture of the tunica albuginea, seeping of blood beneath the penile skin, and development of a hematoma. For most, the ideal treatment is immediate surgical intervention to evacuate the leaked blood and suture the tear in the tunica. Left untreated, a penile fracture may cause scarring at the site of the rupture, with subsequent curvature of the penis during erection.