A fractured penis swells rapidly, turns deep purple or black, and loses its erection almost instantly. The combination of dramatic swelling and dark bruising gives it a characteristic appearance that doctors sometimes call “eggplant deformity” because the penis closely resembles a large, dark eggplant in both shape and color. If you’re searching for this, you probably suspect something happened during sex or want to know what to watch for. Here’s exactly what a penile fracture looks like, what causes it, and what happens next.
What You’ll See and Hear
The first sign is usually not visual at all. Most people report hearing a distinct popping, cracking, or snapping sound at the moment of injury. This is followed almost immediately by a complete loss of erection. Within seconds to minutes, the visual changes start.
The penis swells significantly, often to several times its normal girth. Dark bruising spreads rapidly across the shaft, turning the skin deep purple, blue-black, or nearly eggplant-colored. The swelling is not uniform. It tends to concentrate around the site of the rupture, which can make the penis look bent or deformed, angling away from the side of the injury. In some cases, the bruising extends beyond the penis into the scrotum or the lower abdominal area as blood tracks along tissue layers beneath the skin.
Pain is intense and immediate. The combination of sudden loss of erection, an audible pop, severe swelling, and rapidly spreading dark bruising is the hallmark presentation. If all four of these happen together, it is almost certainly a fracture.
What Actually Breaks
There’s no bone in the penis, but the injury is called a fracture because the mechanics are similar. The erectile chambers (two tube-shaped structures that fill with blood during an erection) are wrapped in a tough, fibrous layer. When the penis is erect, this outer layer thins dramatically, going from about 2 millimeters thick down to just 0.25 to 0.5 millimeters. At that thickness, it becomes rigid and loses its flexibility.
A sudden bending force or blunt impact to the erect penis can tear through this thinned-out layer. Blood that was contained inside the erectile chamber spills out into surrounding tissue, which is what produces the rapid swelling and deep bruising. One or both chambers can tear, and in some cases, the urethra (the tube you urinate through) gets damaged as well.
Signs of Urethral Damage
About 10 to 20 percent of penile fractures also involve injury to the urethra. If you notice blood at the tip of the penis, have difficulty urinating, or can’t urinate at all, this suggests the urethra may be torn. Swelling and bruising that extends into the scrotum or perineum (the area between the scrotum and anus) can also indicate urethral involvement, though these signs sometimes take over an hour to appear after the initial injury.
How It Differs From a Vein Rupture
Not every painful, bruised penis is a fracture. A superficial vein on the penis can rupture during sex and produce swelling, bruising, and pain that looks a lot like a fracture at first glance. The key difference is what happens to the erection. With a true fracture, the erection disappears immediately after the pop. With a vein rupture, the erection does not go away right away, and loss of erectile function afterward is rare. A vein rupture still causes alarming bruising and swelling, but it is not a surgical emergency the way a true fracture is.
How It’s Diagnosed
In many cases, the diagnosis is obvious from the physical appearance and the story of what happened. When there’s any doubt, imaging can confirm it. MRI is the most accurate tool, with 100% sensitivity in one controlled study of 38 patients who later had surgery confirming the findings. It also had a 100% negative predictive value, meaning if the MRI says there’s no fracture, there almost certainly isn’t one. Ultrasound is faster and cheaper but depends heavily on the skill of the operator and has higher rates of missed fractures.
Surgical Repair and Recovery
A penile fracture requires surgery. The procedure involves opening the skin, locating the tear in the outer layer of the erectile chamber, draining the trapped blood, and stitching the tear closed. A large meta-analysis of over 3,200 patients found that earlier surgery leads to fewer complications overall, though even patients who had surgery up to a week after injury still had reasonable outcomes.
The concern most people have is whether erections will work normally afterward. Post-surgical erectile dysfunction rates range from 0 to 22 percent across published studies, with most large series reporting rates at the lower end of that range. Some degree of curvature at the repair site is possible as the tissue heals, similar to scar formation anywhere else in the body. Most people who undergo prompt surgical repair return to normal sexual function.
How It Typically Happens
The most common cause is vigorous sexual intercourse, particularly positions where the penis can slip out and strike a partner’s pelvis or perineum during thrusting. Forceful bending during masturbation, rolling over onto an erect penis during sleep, or any sudden lateral force against an erection can also cause it. The injury only happens when the penis is erect, because that’s when the protective outer layer is at its thinnest and most vulnerable to tearing.