What Are the Side Effects of Prostate Artery Embolization?

Prostate artery embolization (PAE) shrinks an enlarged prostate by blocking part of its blood supply with tiny particles, delivered through a needle in an artery rather than an incision. Most of its side effects come from the prostate reacting to that lost blood flow, and they tend to be mild and fade within days to weeks.¹ The rare serious risks involve nearby organs rather than the prostate, because the particles travel through shared, often twisting arteries.² Compared with standard prostate surgery, men tend to have fewer complications and keep their sexual function better.³

What the First Few Days Usually Feel Like

Doctors call the expected reaction “post-PAE syndrome,” a cluster of symptoms that can last for days after the procedure.⁴ It can include nausea, vomiting, fever, pelvic pain, and painful or frequent urination.⁵ Across studies, about 1 in 4 men develop this flare, though reported rates range from about 1 in 8 to nearly half.⁶ Burning or stinging when you urinate is the single most common complaint, affecting about 1 in 5 men.⁷ Pain around the prostate or pelvis is almost as common, also about 1 in 5.⁸

Most men go home the same day, tired and with some pelvic ache. Burning urination often peaks in the first few days and then eases. A low-grade fever and mild nausea usually settle within the first week. Urinary symptoms may even feel a little worse before they start to improve, which is part of the swelling cycle and not a sign something has gone wrong.

Doctors commonly send men home with pain relievers and anti-inflammatory medicine, and some add a medicine to calm bladder spasms or burning. Drinking fluids steadily keeps urine dilute and less irritating. Ask your team before the procedure which medicines to take and for how long.

Mild fever and aching are expected. A high or rising fever with chills is not, and neither is pain that steadily worsens instead of easing; both deserve a call. Being completely unable to urinate needs prompt attention, covered next.

Blood in Urine or Semen and Difficulty Urinating

Reported minor problems after PAE include blood in the urine, blood in the semen, urinary infection and rectal bleeding, all at low rates.⁹ In one group of about 140 men, a handful noticed mild blood in their semen during the first 1 to 4 weeks, and it went away by itself without treatment in every case.¹⁰

Pink or brown semen in the first weeks is usually harmless and temporary. Light pink urine can occur too. Bright red urine or clots warrant a call. Mention any bleeding at follow-up even if it has stopped.

Some men suddenly cannot pass urine soon after PAE.¹¹ The inflamed, swollen prostate can squeeze the urine channel shut.¹² It is usually handled successfully with a catheter, a thin tube placed through the penis into the bladder to drain it.¹³ One experienced specialist sees this mainly in men who were already close to being unable to urinate before treatment.¹⁴

Retention feels like a full, painful bladder with little or no urine coming out. It needs same-day care, often an emergency visit, to place a catheter. It tends to appear in the first days, when swelling is at its worst. The catheter holds the bladder empty while the swelling goes down, and the team then tests whether you can pass urine without it. Needing one once does not mean the procedure failed.

Infection may show as worsening burning, cloudy or smelly urine, and fever. It is treated with antibiotics.

If you already use a catheter because of retention before PAE, you may keep it afterward until the prostate shrinks. The team usually tries removing it after some weeks to see whether you can urinate.

Bruising and Problems at the Needle Site

The doctor reaches the prostate arteries through a needle in either the wrist or the groin. Bruising at the puncture affected about 1 in 100 men when the wrist was used, versus about 6 in 100 with the groin.¹⁵ A lump of collected blood under the skin occurred in under 1 in 100 with the wrist versus about 4 in 100 with the groin.¹⁶ So if you have a choice, wrist access tends to mean fewer puncture-site problems.

Expect a pressure dressing and limits on lifting or bending for a day or so. Groin access usually means lying flat for a few hours afterward, while wrist access usually lets you sit up and walk sooner. A growing, painful swelling or bleeding through the dressing needs prompt attention. Ask whether your doctor routinely uses the wrist or the groin, since some men’s arteries suit one route better.

Rare Serious Risks When Particles Reach the Wrong Artery

The most serious risks come from particles ending up in an artery that feeds a nearby organ instead of the prostate.¹⁷ The prostate’s arteries vary in where they start, can be twisted, and can be narrowed upstream.¹⁸ The bladder and rectum are the organs most at risk.¹⁹ In one early series, one man developed a small area of damaged bladder wall from lost blood flow.²⁰

Particles reaching the penile arteries can cause tissue death of the penis, a rare but serious event.²¹ The head of the penis can become congested, ulcerated and damaged.²² Report these warning signs urgently: darkening, sores or severe pain on the head of the penis; rectal bleeding or severe rectal pain; severe lower belly pain or heavy blood in the urine beyond the first days.²³

Particles are released slowly through a tiny catheter while the doctor watches live X-ray images, which lets them stop if dye flows toward a nearby organ. Choosing an appropriate particle size also matters, since very small ones can slip past the target into smaller vessels.

Careful planning lowers the risk. Many teams map the arteries with a scan before the procedure, and doctors may protect side branches before releasing particles. Experience with prostate artery anatomy is worth asking about.

Effects on Erections and Ejaculation

In a group of 167 men, more than 8 in 10 saw little change in erection scores 3 months after PAE.²⁴ Average scores rose slightly over the following year.²⁵ Still, about 1 in 5 men who had normal erections beforehand noticed some decline.²⁶ About 4 in 10 men with mild-to-moderate erection problems reported improvement.²⁷ These scores come from questionnaires that rate firmness and confidence, so a small change in score is not the same as losing the ability to have sex.

About 9 in 10 men kept normal forward ejaculation 12 months after PAE.²⁸ In another set of trials, about 4 in 10 reported less semen and about 1 in 6 reported none.²⁹ Those figures were still less pronounced than after standard prostate surgery, and men rated themselves “not at all bothered” on average after PAE.³⁰

Reduced volume is not the same as losing orgasm. Mention your current function to your doctor.

Many doctors suggest waiting about a week, or until discomfort settles, before resuming sex. Blood in semen in the first few weeks is usually not a reason for alarm.

How PAE Side Effects Compare With Surgery and Other Options

TURP (transurethral resection of the prostate), the standard surgery that removes prostate tissue through the urethra, is the usual comparison. Side effects occurred in about 39 in 100 men after PAE versus about 78 in 100 after TURP.³¹ Hospital stays were about 2 days shorter with PAE, but the procedure itself took about 50 minutes longer.³²

That figure counts all side effects, including mild and temporary ones, not only serious complications. It shows a general pattern rather than your personal odds.

Compared with options like steam treatment and implants, no clear difference in minor or major side effects appeared.³³ In men over 75, serious complications were about 2 in 100 for PAE, similar to other options.³⁴

Beyond side effects, PAE avoids cutting or instruments through the penis. Surgery may give a quicker, more complete symptom improvement. The right choice depends on prostate size, overall health and priorities like sexual function. Ask which options suit your prostate size, and ask each specialist about their own complication rates.

Radiation and Contrast Dye Risks

PAE uses live X-ray imaging, averaging about 30 minutes of X-ray time.³⁵ In one reported case, a very long procedure of 72 minutes caused a radiation skin burn.³⁶ Skin injury from X-rays appears days to weeks later as redness, then possibly blistering or darkening, on the area closest to the beam. The risk climbs with very long X-ray time, and the usual 30 minutes is far shorter, so burns are exceptional. Still, skin redness on the back or buttocks weeks later should be mentioned to your doctor.

In one reported case, the X-ray dye caused kidney failure in a 68-year-old man.³⁷ Carbon dioxide gas can replace dye and does not harm the kidneys,³⁸ so men with kidney disease should ask whether this is possible.

Tell your team about kidney disease, diabetes or past dye reactions. Blood tests check kidney function beforehand, and drinking fluids before and after can help protect the kidneys.

Who Has a Higher Chance of Problems

Older men with hardened, twisting arteries are harder to treat.³⁹ Plaque at artery branch points can make the procedure fail technically.⁴⁰ Experience doesn’t erase this: side effect rates did not change as a doctor gained experience in one group of 296 men.⁴¹⁴²

A workup before the procedure often includes an MRI or CT scan that maps the prostate and its arteries. Tests of bladder function check whether the prostate is the real cause of your symptoms. Men already close to not being able to urinate face a higher retention risk. Bring a list of heart, vessel and kidney conditions to your consultation, and ask how your anatomy looked on the scan.

Will You Need Another Treatment Later

In over 1,000 men, about 3 in 100 needed another procedure within 1 year.⁴³ About 1 in 5 needed one by 5 years,⁴⁴ and more than half had another procedure by 10 years.⁴⁵ About 1 in 3 had surgery within 10 years.⁴⁶ The figures count any further procedure, and some of the 1 in 3 who had surgery had a repeat procedure first, so the groups overlap.

Options include a repeat embolization or surgery. Needing retreatment is not a complication but a sign that symptoms returned, so tracking urinary symptoms yearly helps you notice change early.