What’s normal after a vasectomy — and what isn’t

Normal: the unglamorous week one

Expect bruising — sometimes dramatic-looking, spreading down the scrotum or up toward the groin and turning yellow-green as it fades over a week or two. It looks worse than it is.

Expect the ache. Most men describe it as the low, dragging “golf-ball” ache of a mild knock to the groin, worst in the first 48 hours, then fading with occasional twinges. Paracetamol and supportive underwear manage it for most men; avoid aspirin in the first few days because it can worsen bleeding and bruising.

Also normal: mild swelling that peaks around day 2 and shrinks from there, a little clear or blood-tinged ooze from the wound in the first day, and some blood in the first ejaculates (more on that here).

The small lump: sperm granuloma

Weeks after the procedure, some men find a small, firm, pea-sized lump near the vasectomy site, sometimes tender to squeeze. This is usually a sperm granuloma — a little knot of inflammation where sperm has leaked from the cut end of the tube. Granulomas are common and usually harmless; most settle without treatment, though a persistently painful one can be reviewed and occasionally removed.

Any new lump is still worth showing a doctor once, without urgency, to confirm that’s what it is. A lump that is growing, hot, or increasingly painful moves it from “mention at follow-up” to “book this week”.

Not normal: haematoma

A haematoma is bleeding into the scrotum, and it’s the complication your first-week rules exist to prevent. The tell-tale pattern: swelling that grows quickly — over hours to a day — often after lifting or straining, usually in the first 3–4 days, with the scrotum becoming tight, heavy and painful. Reported rates are in the low single digits percent; small ones resolve on their own over weeks, large ones sometimes need draining.

Caught early, a haematoma is managed with rest, support and review. Ignored, it can mean weeks of discomfort. If one side of the scrotum is visibly inflating, don’t wait to see how big it gets.

Not normal: infection

Wound infections after vasectomy are uncommon — low single digits percent — but they need treatment when they happen. The signs: redness that spreads outward from the wound rather than fading, skin that feels hot, increasing (not decreasing) pain, discharge or pus, and fever. Any fever after a vasectomy earns a same-day GP visit.

The useful rule for the whole first fortnight: the trend should be improvement. Day 5 should feel better than day 2. Anything trending worse — pain, swelling, redness — is a reason to be seen, and infections and haematomas are both far easier to treat early.

Epididymitis: the ache that arrives late

The epididymis is the coiled tube behind each testicle where sperm collect. After a vasectomy it can become inflamed — sometimes weeks or even months later — causing a swollen, tender, heavy feeling at the back of one testicle, occasionally with warmth. This is congestive epididymitis, and it’s usually settled with rest, support, and anti-inflammatory treatment guided by a GP.

It’s worth knowing about because it arrives after you thought you were done recovering, and because it’s treatable — don’t sit on it.

Separate from all of the above: a small proportion of men — roughly 1–2% — develop ongoing scrotal pain lasting beyond three months that is severe enough to affect quality of life (post-vasectomy pain syndrome). It’s uncommon but real, and it has management options. We cover it honestly in our PVPS guide.

Who to call

Start with the clinic that did your vasectomy — most give you an aftercare number and would rather hear from you early. Otherwise your GP, or healthdirect’s 24-hour helpline on 1800 022 222 for advice on how urgent your symptoms are. Severe sudden pain, spreading infection with fever, or rapid one-sided swelling: go to an emergency department.