Priapism treatment
Priapism is an erection that lasts more than 4 hours or happens without sexual arousal. The painful, rock-hard kind (ischemic priapism) is an emergency: treatment drains the trapped blood and injects medicine to tighten the blood vessels, and sometimes needs a small operation called a shunt.
Also called Erection that won't go away, Erection lasting more than 4 hours, Prolonged erection, Painful erection that won't go down, Ischemic priapism, Low-flow priapism, High-flow priapism, Stuttering priapism
- Where
- Emergency department; operating room if a shunt is needed
- Anesthesia
- Numbing injection at the base of the penis; general or spinal anesthesia if a shunt is done in the operating room
- Time in the room
- Often 30 minutes to 2 hours in the emergency department; a shunt takes about 30 to 60 minutes
- Hospital stay
- Often home the same day; one night or more after a shunt or if the erection keeps coming back
- Back to normal
- Soreness and bruising settle in 1 to 2 weeks; erections can take weeks to months to recover
- Back to work
- Often within a few days
Overview
Priapism is an erection that will not go down. Doctors define it as an erection lasting more than 4 hours, or one that happens without sexual desire or stimulation. It is a medical emergency when it is painful and rigid. If your erection has lasted 4 hours, go to the nearest emergency department now, even in the middle of the night. Embarrassment is the most common reason men wait, and waiting is what causes lasting damage.
There are two main types. In ischemic (low-flow) priapism, which is by far the most common, blood is trapped in the penis and cannot drain out. The trapped blood loses its oxygen, the penis becomes very hard and painful, and the erectile tissue starts to be damaged within hours. In non-ischemic (high-flow) priapism, an artery in the penis has been torn, usually by a blow to the groin or penis, and too much blood flows in. The penis is only partly firm and usually not painful. This type is not an emergency in the same way and often settles on its own.
Treatment of ischemic priapism follows clear steps. First the trapped blood is drained with a needle and the penis is rinsed. Then a medicine called phenylephrine is injected to squeeze the blood vessels and stop more blood from flowing in. This works for most men. If it does not, a surgeon makes a small channel, called a shunt, to let blood drain. After a very long episode, some men are offered an early penile implant.
Common causes include erection injections, some medicines (such as trazodone and certain antipsychotics), cocaine and other drugs, and blood disorders, especially sickle cell disease. Many men and boys with sickle cell disease have priapism at some point. Finding the cause matters, because it helps prevent the next episode.
The parts of your body involved
The penis has two spongy erectile chambers, the corpora cavernosa, wrapped in a tough sleeve called the tunica albuginea. In a normal erection, arteries fill the chambers with blood, the swelling squeezes the veins shut, and the blood is held in. Afterward the arteries tighten, the veins open, and the blood drains out. In ischemic priapism this release fails. Blood stays trapped, turns dark and thick as it runs out of oxygen, and the chambers stay painfully hard. The head of the penis (glans) and the spongy chamber around the urethra are separate and usually stay soft, which is a clue doctors look for.
- Erectile chambers (corpora cavernosa)
Two spongy chambers that fill with blood. These are the parts that stay rigid in priapism.
- Tunica albuginea
The tough sleeve around each chamber. It keeps pressure high during priapism, which is why the penis is so hard.
- Head of the penis and spongy chamber
The glans and the corpus spongiosum around the urethra. They usually stay soft in ischemic priapism. Shunts connect them to the erectile chambers to drain blood.
- Penile arteries
Small arteries inside each chamber bring blood in. In high-flow priapism one of them is torn.
- Nerves on top
Nerves carrying feeling run along the top of the penis. A numbing injection here blocks pain during treatment.
Why it’s done
In ischemic priapism, every hour counts. Treatment aims to end the erection as quickly as possible to protect the erectile tissue and your ability to have erections in the future.
- Protect the erectile tissue
Trapped blood starves the tissue of oxygen. The longer it lasts, the more the spongy tissue scars, which can cause permanent erection problems.
- Relieve pain
Ischemic priapism becomes very painful. Draining the blood brings quick relief.
- Prevent scarring and shortening
Scarred erectile tissue can shrink and bend the penis over time.
- Find the cause
Knowing why it happened, such as an injection dose, a medicine or sickle cell disease, helps prevent it from happening again.
- Treat high-flow priapism when needed
If a torn artery does not heal on its own, blocking it can end the partial erection.
Other options
- Home measures
Some men using erection injections are told to try exercise such as climbing stairs, or a cold pack, early on. These may help in the first hour or so. They do not treat established priapism and should never delay emergency care once 4 hours have passed.
- Watching and waiting (high-flow priapism only)
Non-ischemic priapism often settles by itself over days to weeks. Close follow-up is a reasonable first step.
- Blocking the artery (high-flow priapism)
An interventional radiologist passes a thin tube through an artery in the groin and blocks the torn penile artery with tiny particles or coils.
- Early penile implant
After a very long episode, when the erectile tissue is likely badly damaged, placing an implant early can prevent shrinking and scarring.
- Sickle cell care, alongside penile treatment
Fluids, oxygen, pain control and sometimes blood transfusion help. They are given at the same time as draining the penis and should never delay it.
- Prevention for repeated episodes
For stuttering priapism, your urologist and, if needed, a hematologist can suggest medicines and a plan to lower the chance of future episodes.
Getting ready
Tick items off as you go. Your checklist is saved on this device only.
Right now, if an erection has lasted 4 hours
In the emergency department, before treatment
If you use injections for erections
If you have sickle cell disease
The procedure, step by step
Press play or pick a step. Each drawing shows what your surgeon is doing at that moment. Your team may do some steps differently.
1. Finding out which type it is
The doctor examines the penis and asks how long it has lasted. In ischemic priapism the shaft is rock hard and painful while the head is soft. A sample of blood from the penis or an ultrasound confirms the type.
After the procedure
Right afterward
- Watching for a return
You are usually observed for an hour or more after the penis softens to make sure the erection does not come back.
- Blood pressure check
Your blood pressure and heart rate are checked after phenylephrine.
- Looking for the cause
The team reviews your medicines, injection dose and blood tests. If sickle cell disease is suspected, it is tested for.
- Pain relief
You are given a plan for pain medicine as the numbing wears off.
- Going home or staying
Most men go home the same day after draining and medicine. After a shunt, or if the erection keeps returning, you may stay overnight.
At home
- Soreness and bruising
The penis is often bruised and sore for 1 to 2 weeks where the needles went in.
- Swelling
The penis may stay swollen and feel semi-firm for several days. This is different from priapism: it should not be rigid or getting more painful.
- If it comes back
If a firm, painful erection returns, go back to the emergency department right away. Do not wait 4 hours this time.
- Pain relief
Acetaminophen and cold packs over your underwear help. Ask before taking anti-inflammatory medicines.
- Showering
Showering is fine. If you had a shunt, the small stitch on the head dissolves on its own.
- Sex
Ask your team. Many advise waiting until soreness and bruising have gone, often about 2 weeks, and longer after a shunt.
- Medicines and injections
Do not use your erection injection again until your doctor has reviewed the dose. Do not stop other prescribed medicines without talking to the prescriber.
- Follow-up
See your urologist within about 1 to 2 weeks. Erections are usually checked again over the following months.
Recovery timeline
- Hour 0The erection starts
Note the time. If you use injections, follow your doctor's early plan.
- 4 hoursGo to the emergency department
An erection lasting 4 hours needs emergency treatment.
- First hours in hospitalDraining and medicine
Most men are treated successfully with draining, rinsing and phenylephrine.
- Same dayHome or a shunt
Most men go home. If needed, a shunt is done the same day.
- Days 1 to 7Swelling and bruising
The penis is sore, bruised and may feel semi-firm. This gradually settles.
- Weeks 1 to 2Follow-up visit
Your urologist checks healing, reviews the cause, and makes a plan to prevent a repeat.
- 1 to 6 monthsChecking erections
Erections may take time to return. Your urologist can offer treatment if they do not.
- Long termPrevention
A plan for future episodes, especially for men with sickle cell disease or who use injections.
What it feels like
Priapism is frightening and embarrassing, and many men delay coming in because of that. Emergency teams see it regularly and treat it as the urgent medical problem it is. Relief usually comes within minutes of draining the blood.
The hours before coming in
Many men hope it will go away and feel too embarrassed to go to the hospital. The pain gets worse and so does the worry.
What helpsGo in as soon as it reaches 4 hours. Earlier treatment is easier and gives the best chance of normal erections later.
Explaining it at the front desk
Saying it out loud to a stranger feels awkward.
What helpsKeep it simple: tell them how many hours the erection has lasted. Staff are trained to move you quickly.
The numbing and the needle
The numbing injection stings. The draining needle feels like pressure, and the sight of dark blood can be upsetting.
What helpsLook away and breathe slowly. Most men feel a big drop in pain as soon as the blood starts to drain.
The phenylephrine
Some men feel a pounding heartbeat, a headache, or flushing after each dose.
What helpsTell the team how you feel. They are watching your blood pressure and will adjust.
When it goes down
Relief, often mixed with worry about whether erections will work again. The penis may still feel swollen.
What helpsSome swelling is normal for a few days. Ask your urologist what to expect for you based on how long it lasted.
After a shunt
The head of the penis is sore and the area is bruised.
What helpsCold packs and pain medicine help. The small stitch dissolves on its own.
Worrying about the future
Many men fear it will happen again or that their sex life is over.
What helpsA clear prevention plan helps. If erections do not recover, there are good treatments, including implants.
How well it works
Success means the erection goes down and stays down, and the erectile tissue is protected. Long-term erection function depends mostly on how long the priapism lasted before treatment.
- Ending the erection
Draining, rinsing and phenylephrine work for most men with ischemic priapism. A shunt is needed when they do not.
- Erections later
If treated within the first several hours, many men keep good erections. After about 24 hours the chance of lasting erection problems rises sharply, and after 36 to 48 hours most men develop permanent erection problems.
- Checking recovery
Your urologist checks erections over the following months. If they do not recover, pills, injections or an implant can help.
- Preventing the next episode
Adjusting injection doses, changing medicines, and treating sickle cell disease all lower the chance of another episode.
Risks
Every operation has risks. These are the ones people ask about most, with honest odds where good numbers exist. Your surgeon’s own results matter more than averages.
Common
Where the needles went in. Usually settles in 1 to 2 weeks.
The penis may ache for several days.
Headache, a pounding or slow heartbeat, high blood pressure and flushing. These usually pass quickly.
Some men need repeat treatment, especially in sickle cell disease.
Less common
The chance depends mostly on how long the priapism lasted. It is lower when treatment starts within several hours and much higher after a day or more.
Damaged erectile tissue can scar, making the penis shorter or bent.
Infection at the needle or shunt site is uncommon and treated with antibiotics.
Blood can collect under the skin. Most settle without treatment.
Rare
Damage to the urine tube from the needle or shunt is rare.
Very rarely the head of the penis or skin is damaged after a shunt.
Serious heart rhythm problems or very high blood pressure from phenylephrine are rare. The risk is higher with heart disease, which is why you are monitored.
Call your care team or go to the emergency room if
- An erection lasting 4 hours or longer, or a painful erection without sexual arousal: go to the nearest emergency department now
- The erection comes back after treatment
- Severe headache, chest pain, or a pounding or racing heartbeat after phenylephrine (call 911)
- Fever of 101°F (38.3°C) or higher
- The skin of the penis or the head turns dark, black or very pale
- You cannot pass urine, or there is bleeding that does not stop with 10 minutes of firm pressure
- With sickle cell disease: chest pain, trouble breathing, weakness on one side, or severe pain anywhere (call 911)
Questions to ask your surgeon
- Which type of priapism did I have?
- Why did this happen to me?
- Should I change my erection injection dose or any of my medicines?
- Based on how long it lasted, what is my chance of erection problems later?
- When can I have sex again?
- If it happens again, what should I do first and where should I go?
- Do I need blood tests for sickle cell disease or other blood disorders?
- Should I see a hematologist?
- Is there a medicine to prevent future episodes?
- If my erections do not recover, what are my options?
Words you may hear
- Priapism
- An erection that lasts more than 4 hours or happens without sexual arousal.
- Ischemic (low-flow) priapism
- Blood trapped in the penis without fresh oxygen. Painful and an emergency.
- Non-ischemic (high-flow) priapism
- Too much blood flowing in from a torn artery. Usually not painful and not an emergency.
- Stuttering priapism
- Repeated episodes of prolonged erections, often in sickle cell disease.
- Corpora cavernosa
- The two spongy erectile chambers of the penis.
- Aspiration
- Drawing blood out of the penis with a needle and syringe.
- Irrigation
- Flushing sterile salt water in and out to clear thick blood and clots.
- Phenylephrine
- A medicine that squeezes blood vessels, injected into the penis to help end the erection.
- Blood gas
- A test of the oxygen and acid level in blood.
- Doppler ultrasound
- An ultrasound that shows blood flow.
- Shunt
- A small surgical channel that lets trapped blood drain from the erectile chambers.
- Embolization
- Blocking a blood vessel from the inside with tiny particles or coils, guided by X-ray.
- Sickle cell disease
- An inherited blood disorder in which red blood cells can become stiff and block small vessels.
Common questions
Can I just wait it out?
Not if it has lasted 4 hours. Ischemic priapism rarely goes away on its own once established, and damage builds with every hour. Going in early gives you the best chance of normal erections later.
Will I be able to have erections again?
It depends mostly on how long it lasted. Men treated within several hours often recover well. After a day or more, lasting erection problems are much more likely. If erections do not return, there are good treatments.
Can ED pills cause priapism?
Rarely. Pills such as sildenafil and tadalafil seldom cause priapism. Erection injections cause it more often, which is why doses are adjusted carefully.
Why does my penis still feel swollen after treatment?
Fluid and bruising can keep it swollen and semi-firm for several days. That is normal. A return of a rigid, painful erection is not, and needs treatment right away.
Do boys get priapism?
Yes, especially boys with sickle cell disease. It is treated with the same urgency as in adults. Parents should seek emergency care for an erection that lasts or is painful.
Will it happen again?
It can, especially with sickle cell disease or if the cause is not changed. Your urologist will help you make a plan to lower the risk and know what to do if it happens.
Sources this page draws on
- American Urological Association and Sexual Medicine Society of North America, Diagnosis and Management of Priapism: AUA/SMSNA Guideline
- European Association of Urology, EAU Guidelines on Sexual and Reproductive Health (priapism section)
- National Heart, Lung, and Blood Institute, Sickle Cell Disease
- Urology Care Foundation, Priapism
- MedlinePlus (U.S. National Library of Medicine), Priapism
Written November 2026. This page explains what usually happens. It is not medical advice and does not replace a conversation with your own surgeon, whose plan for you comes first.