What are common physical injuries partners can experience during sex with a very large penis?

1. Penile fracture: the headline emergency

The clearest and most repeatedly reported injury is a “penile fracture,” which is not a broken bone but a tear of the tunica albuginea around the corpora cavernosa, usually from forceful bending or blunt impact of an erect penis during sex; classic signs include a cracking sound, immediate pain, rapid loss of erection, swelling and bruising, and prompt surgery is typically recommended to reduce the risk of long‑term dysfunction ^{[1] [5] [2] [4]}.

2. Associated urethral and urinary damage

Penile fractures can be accompanied by urethral injury — sometimes complete — producing blood at the meatus, difficulty urinating, or the need for catheterization; case reports and reviews stress that combined injuries can require complex reconstruction and that early surgical management gives better outcomes ^{[1] [4] [3]}.

3. Soft‑tissue trauma: cuts, friction and mucosal lacerations

Less dramatic but more common injuries include superficial lacerations, friction burns, and vaginal or penile mucosal tears. Clinics and specialty centers note that many sexual‑activity injuries are minor (bruising, small lacerations) and are seen more often than catastrophic events ^{[6] [5]}.

4. Swelling, bruising and temporary changes after repair

After surgical repair for serious penile injury, typical sequelae reported by hospitals include temporary swelling and bruising, stitches that may be felt under the skin, sometimes circumcision, catheter use, and a recommended abstinence period (often six weeks) to allow healing; late complications can include curvature, numbness, bleeding, infection, or erectile difficulty ^{[3] [7]}.

5. How “size” factors into risk — what reporting says and what it doesn’t

Clinical literature frames most traumatic events as related to the mechanics of an erect penis striking a hard surface (perineum, pubic bone) or being forcibly bent during thrusting rather than an explicit metric of length or girth; reports emphasize vigorous intercourse, particular positions (partner on top, positions where visual control is limited), and slipping out and striking bone as common mechanisms ^{[5] [8] [7]}. Available sources do not quantify injury risk specifically by penis size or give reliable incidence rates tied to “very large” penises; they describe mechanism and context rather than size thresholds ^{[1] [5]}.

6. Frequency and perspective: uncommon but serious when it happens

Multiple reviews and textbooks stress that although penile fracture and major penile trauma are rare relative to overall sexual activity, when they occur they are surgical emergencies because delayed treatment increases the chance of lasting sexual and urinary dysfunction ^{[1] [4]}. Emergency‑department level coverage estimates vary, and some consumer outlets note penile injuries make up a small fraction of ER visits ^[9].

7. Practical prevention and aftercare reported by clinicians

Urology sources and patient information pages advise practical measures tied to the injury mechanisms: use lubrication to reduce friction and mucosal tearing, communicate about comfort and depth, avoid risky positions if you can’t control angle or depth, guide the penis during position changes, and seek immediate medical attention for severe pain, an audible “pop,” rapid detumescence, marked swelling/bruising, or urinary problems — all steps aimed at preventing or minimizing the types of trauma described in the literature ^{[7] [8] [3]}.

Limitations and open questions: the reviewed sources consistently document the types of injuries and their mechanisms but do not supply robust, peer‑reviewed data that directly tie injury frequency to specific penis dimensions; therefore, while mechanics suggest larger size could increase contact forces in some scenarios, available reporting does not offer definitive size‑based risk estimates ^{[1] [5]}.