What Happens to the Penis in Untreated Priapism?

Left untreated, the most common kind of priapism slowly destroys the tissue that makes erections possible, because blood that can’t drain out of the penis runs out of oxygen.1Weill Cornell Medicine. What Happens to the Penis in Untreated Priapism? That makes it a medical emergency, not an embarrassing inconvenience to wait out.2PubMed. Acute Ischemic Priapism: An AUA/SMSNA Guideline What happens depends heavily on the clock, so the outcome is decided mostly by how many hours pass before treatment. One rarer form keeps fresh blood flowing and does far less harm, which is why doctors first work out which kind you have.

Why Trapped Blood Damages the Penis

During arousal, two spongy chambers inside the shaft fill with blood while the smooth muscle in their walls relaxes to let them expand. Afterward the muscle tightens and blood flows out through veins, which ends the erection. In the common form, doctors call it ischemic priapism, blood flows in but cannot drain back out.3PubMed Central. Diagnostic and therapeutic options for the management of ischemic and nonischemic priapism In this form the release signal fails, so the erection is held by stagnant blood rather than fresh circulation.4Weill Cornell Medicine. What Happens to the Penis in Untreated Priapism? Pressure builds inside a closed space, much like a crush injury to a limb.5Weill Cornell Medicine. What Happens to the Penis in Untreated Priapism? The trapped-blood type is usually painful, and the shaft feels rock hard.

The longer the blood sits, the less oxygen and the more acid it holds. In measured cases, blood drawn from the penis carried about one-fifth the normal oxygen saturation, and it was strongly acidic and loaded with carbon dioxide.6PubMed Central. Ischemic priapism as a model of exhausted metabolism The tissue keeps using oxygen and sugar it can no longer get, and running out of both together harms the smooth muscle.7PubMed Central. Recent advances in understanding and treating priapism By around 4 hours, muscle cells that control erections begin to die.8PubMed Central. Recent advances in understanding and treating priapism

None of this is visible from outside. The skin can look normal while the tissue inside is already failing. Pain may ease as hours pass, and some people mistake that for improvement, but feeling better is not a sign the tissue is recovering.

The Damage Timeline Hour by Hour

Count from when the erection began, not from when it started hurting. Hours spent hoping it would settle down count just as much as travel time. Note the start time before you go in, because doctors base treatment on it.

The 4-hour mark is the point to stop waiting and head to an emergency department. Early treatment is usually quick and done with a needle, not surgery, so each hour of delay trades a simple fix for a harder one.

In a large hospital series, duration was the strongest predictor of later erection problems, stronger than age, diabetes or blood pressure.15PubMed Central. Risk factors, diagnosis, and long-term erectile dysfunction outcomes in priapism: a retrospective analysis of 186 cases from a single institution Men who waited 20 to 36 hours had about 25 times the odds of new erection problems compared with those treated within 4 hours.16PubMed Central. Risk factors, diagnosis, and long-term erectile dysfunction outcomes in priapism: a retrospective analysis of 186 cases from a single institution After 36 hours the odds were about 60 times higher.17PubMed Central. Risk factors, diagnosis, and long-term erectile dysfunction outcomes in priapism: a retrospective analysis of 186 cases from a single institution Even delays of 4 to 20 hours trended toward more problems.18PubMed Central. Risk factors, diagnosis, and long-term erectile dysfunction outcomes in priapism: a retrospective analysis of 186 cases from a single institution

These figures describe groups of men and shifting odds, not a switch that flips at a particular hour for every individual. Men treated late still benefit from care, because ending the erection and planning next steps such as an implant still matter. Going in at hour 30 is much better than hour 60, so a long delay is a reason to go immediately, not to give up.

What the Penis Is Left With

Dead smooth muscle is replaced by stiff scar tissue.19PubMed Central. Recent advances in understanding and treating priapism The chambers can then no longer fill and hold blood normally.20PubMed. Acute Ischemic Priapism: An AUA/SMSNA Guideline Erectile dysfunction follows, and after 48 hours it develops in essentially everyone.21PubMed Central. Recent advances in understanding and treating priapism Scarring also pulls the tissue tighter, so the penis often ends up shorter.22PubMed Central. The use of penile prostheses in the management of priapism The shaft may feel firm or lumpy in places, and these changes generally don’t reverse on their own.

Erections after priapism may be weak, partial, or absent altogether. Pills often help less because the tissue itself is scarred. Sensation and orgasm may still occur even without a firm erection.

Over years of follow-up in one group of men with the trapped-blood type, fewer than half, 43%, kept normal erections.23PubMed. Low-flow priapism: risk factors for erectile dysfunction Those who did were mostly treated before 48 hours and had no scarring.24PubMed. Low-flow priapism: risk factors for erectile dysfunction Whether the erection fully went down with treatment mattered too.25PubMed. Low-flow priapism: risk factors for erectile dysfunction

Even after the erection has been ended, the penis may stay soft for a while from swelling and bruising, and this alone doesn’t show whether permanent damage occurred. Doctors usually judge the outcome over weeks to months, watching whether spontaneous erections, such as morning erections, return. Early return of firm erections is a good sign, while their continued absence can point toward scarring. Men who had a prolonged episode are usually best followed by a urologist so problems are caught and options discussed early.

Rare Worst Cases Like Gangrene

In one reported case, the tip of the penis darkened and turned gangrenous after prolonged priapism.26PubMed Central. Penile Gangrene: An Unusual Complication of Priapism in a Patient with Bladder Carcinoma In another, an older man with a severe genital infection and priapism lost the whole penis.27Integrative Journal of Medical Sciences. A Case of a Penile Necrosis in a Patient with Simultaneous Fournier’s Gangrene and Priapism These patients had other serious illness, cancer or infection, and were not typical cases.

Skin turning dark, purple or black needs immediate care. So do cold or numb skin, a foul smell, or spreading redness. These are emergencies separate from the erection itself. Most men with prolonged priapism lose erectile function and not the organ itself.

When the Erection Is High-Flow Instead

Non-ischemic (high-flow) priapism comes from too much blood flowing in, not trapped blood.28PubMed Central. Diagnostic and therapeutic options for the management of ischemic and nonischemic priapism An injured artery can pour blood straight into the erectile tissue, often after a blow such as a straddle fall onto a bike bar.29PubMed Central. Multimodality magnetic resonance imaging for the diagnosis of high-flow priapism following a straddle injury The blood stays oxygen-rich and keeps moving,30Weill Cornell Medicine. What Happens to the Penis in Untreated Priapism? so it does not cause the hour-by-hour damage of the trapped-blood type.31Renal and Urology News. Priapism

The high-flow type is usually painless and only partly rigid. It often follows a groin or penile injury, sometimes days later. You still can’t safely self-diagnose, so get checked either way.

Doctors draw blood from the penis and test its oxygen and acid levels.32Blood. How I treat priapism Trapped blood is low in oxygen and acidic, while high-flow blood looks like normal arterial blood.33Blood. How I treat priapism An ultrasound showing blood flow helps confirm which type it is.34PubMed. Management strategy for arterial priapism: therapeutic dilemmas

Because the tissue is not starved of oxygen, there is usually no emergency, and doctors often start by watching and waiting. Some cases resolve on their own, quite unlike the trapped-blood type, where waiting is dangerous. If treatment is needed, doctors can block the injured artery with a small imaging-guided procedure that seals the abnormal connection.

What Emergency Treatment Involves

First-line treatment is draining blood through a needle and injecting phenylephrine, a drug that tightens blood vessels.35Journal of Urology. Diagnosis and Management of Priapism: AUA/SMSNA Guideline If the erection persists, surgeons create a shunt, a small channel that lets the trapped blood drain.36Journal of Urology. Diagnosis and Management of Priapism: AUA/SMSNA Guideline After about 36 hours, simple drainage usually isn’t enough and shunt surgery becomes necessary.37PubMed. Effects of priapism lasting 24 hours or longer caused by intracavernosal injection of vasoactive drugs

At the emergency department, numbing medicine is given at the base of the penis first. Blood is then drawn out with a needle, often in several rounds. Your heart rate and blood pressure are watched because of the injected drug. Tell staff exactly when the erection started and what medicines or injections you used. Cold packs or exercise do not reliably end this type of priapism, and waiting overnight loses critical hours.

Draining and the injected medicine may be repeated several times before doctors decide the approach has failed. Shunt surgery is done by a urologist, often with anesthesia. It ends the erection in many cases but does not undo damage already done.

Implants When Damage Is Done

After priapism longer than 48 hours, a penile prosthesis, an implant placed inside the penis, is often needed to have erections again.38PubMed Central. The use of penile prostheses in the management of priapism Guidelines say doctors may consider an implant after untreated priapism longer than 36 hours or when shunts fail.39Journal of Urology. Diagnosis and Management of Priapism: AUA/SMSNA Guideline

An implant is usually considered for men whose erections have not returned and whose erectile tissue is scarred, since pills and injections depend on tissue that can fill with blood. Doctors often check whether the chambers still fill before deciding, because some men recover enough to avoid surgery. Men with other health problems or active infection may need those addressed first.

Inflatable implants have cylinders inside the penis, a fluid reservoir and a pump in the scrotum, and they allow an erection on demand. Malleable implants use bendable rods that keep the penis semi-rigid and are positioned by hand, which makes them simpler and sometimes easier in difficult cases. The choice depends on the state of the tissue, the surgeon’s judgment and the patient’s preference.

Timing matters. Delayed implants had about four times the complications of early ones,40Journal of Urology. EARLY VS DELAYED INSERTION OF PENILE PROSTHESIS IN PATIENTS WITH REFRACTORY PRIAPISM: A SYSTEMATIC REVIEW AND META-ANALYSIS because scar tissue hardens over time and makes surgery harder.41PubMed Central. Early Inflatable penile prosthesis implantation offers superior outcomes compared to delayed insertion following ischemic priapism: a narrative review Experts favor fitting an implant within about 30 days.42Journal of Urology. EARLY VS DELAYED INSERTION OF PENILE PROSTHESIS IN PATIENTS WITH REFRACTORY PRIAPISM: A SYSTEMATIC REVIEW AND META-ANALYSIS Late implants also needed repeat surgery more often.43PubMed. Comparative Outcomes of Early versus Delayed Penile Prosthesis Insertion in Patients With Ischaemic Priapism-Long-Term Outcome Experience From a Single High-volume Centre Fitting early can help limit the shortening caused by scar tissue, and the decision is usually made with a specialist soon after treatment.

Common Causes and Repeat Episodes

Many drugs cause priapism by blocking the nerve signal that lets an erection go down.44PubMed Central. The Risk of Priapism with Medications: What You Need to Know Trazodone, a sleep and depression medicine, is a known culprit.45Psychiatrist.com. Psychotropic Medication–Induced Priapism: An Approach to Diagnosis and Treatment Sertraline and some antipsychotics such as quetiapine and risperidone can do it too.46Psychiatrist.com. Psychotropic Medication–Induced Priapism: An Approach to Diagnosis and Treatment Erection injections for impotence can also cause prolonged erections.47PubMed. Effects of priapism lasting 24 hours or longer caused by intracavernosal injection of vasoactive drugs Rarely, cancer spreading to the penis causes priapism, and those cases carry a poor outlook.48PubMed Central. Malignant priapism secondary to metastatic prostate cancer: a case report and review of literature

If you take one of these medicines, don’t stop it on your own; talk to your prescriber. Ask whether priapism is a listed risk and what to do if it happens. Any erection over 4 hours on these drugs means emergency care.

Injection treatments for erectile dysfunction can cause a prolonged erection if the dose is too high for that person. Men using them should know their doctor’s instructions for an erection that lasts too long and follow them. Oral ED pills rarely cause priapism but can in some cases, so a long erection on them still deserves care.

In sickle cell disease, thick oxygen-poor blood blocks drainage, causing scarring and impotence.49PubMed Central. Priapism in Sickle Cell Anemia: Emerging Mechanistic Understanding and Better Preventative Strategies Some men have repeated short episodes.50Weill Cornell Medicine. What Happens to the Penis in Untreated Priapism? The body’s normal off-switch for erections may be faulty, especially in sickle cell disease.51PubMed Central. Advances in the understanding of priapism

A plan with your doctor can set when to treat at home and when to go in. Short repeated episodes can still add up to damage over time.