Vasectomy Risks & Post-Vasectomy Pain Syndrome | Dr. Theodore Cisu

The short answer: Vasectomy is a very safe procedure. Most men have only mild soreness for a few days. Bleeding or infection happens in about 1 to 2% of men or fewer, and chronic pain that affects quality of life happens in fewer than 1%. You deserve to hear the real numbers before you decide.

Written by Theodore Cisu, MD, board-certified urologist. Based on the American Urological Association (AUA) Vasectomy Guideline (2026). Last reviewed November 2026.

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Normal recovery isn't a complication

Most of what men feel after a vasectomy is ordinary healing: soreness that peaks around the first day or two, mild bruising, and some swelling that settles over about a week. Ice, supportive underwear and over-the-counter pain relief usually handle it. A little oozing from the tiny opening on the first day is expected. For the full picture, see the vasectomy recovery timeline.

Bleeding and hematoma

The most common true complication is bleeding under the skin that collects into a firm, tender, growing swelling called a hematoma. The AUA puts bleeding complications at about 1 to 2% or less. Most hematomas settle with rest, ice and support, and a few need to be seen. Following your after-care instructions lowers the risk: rest for the first couple of days, and avoid heavy lifting, hard exercise and sexual activity for about a week. If you take a blood thinner, Dr. Cisu will tell you whether and when to stop it. Don't stop a prescribed medication on your own.

Infection

Infection is also uncommon, about 1 to 2% or less. With the no-scalpel technique there's one tiny opening rather than an incision. Call the office for spreading redness, warmth, pus, increasing pain or a fever. Infections are usually straightforward to treat.

Sperm granuloma

Sometimes a little sperm leaks from the end of the tube and the body walls it off into a small, firm lump called a sperm granuloma. Most are painless and need no treatment. Occasionally one is tender for a while and then settles. It isn't dangerous.

Vasectomy failure

No birth control method is perfect. Occasionally sperm still show up on the follow-up test and a repeat vasectomy is needed, which the AUA puts at up to about 1%. That's why you use other birth control until your semen analysis confirms there are no sperm. After you're cleared, the chance of a pregnancy is about 1 in 2,000.

Very rarely, the cut ends of the tube find their way back together months or years later. This is called recanalization. Dr. Cisu uses an electric cautery device to seal each end of the tube with heat, then separates the ends with a layer of tissue to make this as unlikely as possible.

Post-vasectomy pain syndrome (PVPS)

This is the risk men usually have read something worrying about, so it deserves a straight answer.

What it is

PVPS is scrotal pain that lasts three months or longer after a vasectomy. It ranges from an occasional mild ache to, rarely, pain that gets in the way of daily life. It's thought to involve irritation of small nerves.

How common it is

Based on the AUA's 2026 review, chronic pain severe enough to affect quality of life happens in fewer than 1% of men. Milder aches that come and go are more common in the first weeks to months, and most fade on their own.

What can be done

When pain lasts, there are real options. Treatment often starts with simple measures such as anti-inflammatory medication, support and time. Some men benefit from nerve blocks or other treatments, and a small number need a further procedure.

What you've read online

Forum stories about long-lasting pain are real and deserve to be taken seriously. Keep in mind who writes them, though. Men who are still struggling are far more likely to post than men whose recovery was uneventful, so online threads skew toward the hardest outcomes. The clinical data give a more balanced picture: a small number of men have lasting discomfort, and most don't.

When to call

Call the office at (540) 332-5630 for:

• Swelling that grows quickly or is hard and one-sided
• Bleeding that soaks through the dressing
• Fever over 100.4°F
• Pain that gets worse instead of better
• Spreading redness, warmth or pus
• Trouble urinating

For an emergency, call 911 or go to the nearest emergency room.

Frequently asked questions

What's the worst that can realistically happen?

For most men, a few uncomfortable days. The less common problems, such as a hematoma, an infection or longer-lasting pain, are usually treatable. Serious, lasting problems are rare.

How often do complications happen?

Bleeding and infection each happen in about 1 to 2% of men or fewer. Chronic pain that affects quality of life happens in fewer than 1%.

Is a hematoma an emergency?

A small, stable bruise isn't. A swelling that grows quickly or becomes very painful should be checked the same day. Call the office.

Am I more likely to have chronic pain?

Men who already live with chronic pain conditions may be at higher risk. Mention any history of scrotal or pelvic pain at your consultation.

If something worries me after I get home, who do I call?

Call the office at (540) 332-5630, which reaches the urology team for both offices. Most questions can be handled by phone, and you can be seen in person if needed.

Sources

• American Urological Association. Vasectomy: AUA Guideline (2026), Part I.

This article is for general education and isn't a substitute for medical advice. If you think you have an emergency, call 911 or go to the nearest emergency room.