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After your biopsy

Infection After a Prostate Biopsy: — What You Need to Watch For

Infection is the most serious complication of a prostate biopsy. It is uncommon, but when it happens it can move fast — and a fever after the procedure is always a same-day call to your team.

Medically reviewed by Dr. T. Raghavender Reddy, Medical Oncologist, MBBS · DM (Medical Oncology) · MD (Radiation Oncology) · Last reviewed September 2026

  • Fever is never normal after a biopsy — Any fever needs a same-day call, not home management or wait-and-see.
  • Sepsis can develop within hours — Serious infection can escalate from mild symptoms to hospital-level illness quickly.
  • Prevention starts before the procedure — A rectal swab taken beforehand guides which antibiotic will actually work for you.
  • The biopsy route matters — A transperineal approach carries substantially lower infection risk than a transrectal one.
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Infection is the most serious risk of a prostate biopsy. Most people recover without one, but sepsis can develop within the first few days. A fever after your biopsy is never normal — call your team the same day, or go to the emergency department if you feel very unwell.

What does your team do to reduce your infection risk?

  1. Rectal swab, a few days before

    A swab is taken to identify which bacteria are present in your rectum and which antibiotics they respond to.

  2. Antibiotic choice based on your swab

    The swab result guides which antibiotic you are given — chosen for your specific bacteria, not a standard prescription.

  3. Route selection

    Your urologist will discuss whether a transrectal or transperineal approach is right for you. Infection risk is one of the key factors in that decision.

  4. Antibiotics before the procedure

    You are given antibiotics before the biopsy begins to reduce the chance of bacteria entering the bloodstream via the needle.

  5. Clear instructions before discharge

    You will be told what symptoms to watch for and who to contact if they appear. Do not leave without this.

How common is infection after a prostate biopsy?

Most people do not develop a serious infection. The concern is not that it is common — it is that in the minority who do, it can escalate quickly.

Sepsis occurs in a small but meaningful proportion of transrectal biopsies. Both NCCN and the European Association of Urology identify it as one of the most significant complications of the procedure.

Your personal risk depends on the route used, whether the swab guided your antibiotic choice, and your own health. Centres that have moved to transperineal biopsy report substantially lower rates.

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What are the warning signs of infection after a prostate biopsy?

A fever is the earliest and most important sign. It is not expected after a biopsy and is a same-day call — or a trip to the emergency department if you feel very unwell.

Other signs include uncontrollable shivering or chills, worsening pain in the perineum or lower abdomen, a burning sensation when passing urine that is getting worse, or complete inability to urinate.

Most infections appear within the first few days after the procedure. Go to emergency care rather than waiting for a callback. Early antibiotics change the outcome.

Is a transperineal biopsy safer from infection than a transrectal one?

Yes. In a transrectal biopsy the needle passes through the wall of the rectum, which carries bacteria — including strains resistant to commonly used antibiotics. In a transperineal biopsy the needle passes through the skin, which can be properly cleaned beforehand.

European Association of Urology guidance reflects the lower infection rate with the transperineal route, and many centres now prefer it for this reason.

Whether it is the right approach for you is a conversation with your urologist. Both routes produce accurate tissue samples — infection risk is one factor among several.

What else do patients need to know about biopsy infection?

Is blood in my urine or semen a sign of infection?

Blood in your urine and discolouration in your semen are both expected after a biopsy and are not signs of infection on their own. They occur because the needle passes through tissue that bleeds. Urine usually clears within a few days; semen can remain discoloured for several weeks. Watch for these alongside fever or worsening pain — that combination needs same-day review by your team.

Can I take antibiotics I have at home if I feel unwell?

No. Post-biopsy infections often involve bacteria that have become resistant to commonly available antibiotics, particularly those linked to the transrectal route. Taking a leftover course is unlikely to help and can mask symptoms while infection progresses. Call your team or go to the emergency department so the right antibiotic can be given at the right dose after proper assessment.

I already had antibiotics before the biopsy. Can I still get an infection?

Yes. Prophylactic antibiotics reduce the risk significantly but do not eliminate it. If the bacteria present are resistant to the antibiotic given — which is exactly why the rectal swab matters — protection is reduced. Antibiotics before the procedure do not mean that fever or chills afterwards can be ignored. They still mean the same thing: contact your team the same day.

How long after the biopsy can infection still develop?

Most infections appear within the first few days after the procedure, and that is the highest-risk period. Delayed presentations can occur for up to a couple of weeks. For that whole period, any new fever, chills, or worsening pelvic pain should still be reported to your team rather than assumed to be unrelated to the biopsy.

Will getting an infection affect my biopsy results?

No. The tissue sample has already been sent to the pathologist — infection does not change what it shows. If you develop a serious infection, discussing your results may be delayed until you have recovered, because treatment becomes the immediate priority. Once you are well, your results will be given to you as planned.

How serious can post-biopsy sepsis get?

Post-biopsy sepsis can require hospital care including intravenous antibiotics, and is one of the few complications of an otherwise routine procedure that can escalate rapidly. Treated early — ideally within hours of symptoms appearing — the large majority of people recover fully. The single thing that changes the outcome is how quickly care is reached. That is why fever after a biopsy is a same-day event, not a situation to monitor at home.

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Common questions

Frequently asked questions

How likely am I to get an infection after a prostate biopsy?

The risk is real but uncommon, and it varies significantly by route. Transrectal biopsies carry higher infection risk because the needle passes through the rectum; centres that have moved to transperineal biopsy report substantially lower rates. Your individual risk also depends on the swab result, the antibiotic given, and your general health. Your urologist can give you a more specific estimate based on your situation and the approach being planned.

Can I go home straight after a prostate biopsy?

Yes, a prostate biopsy is a day-care procedure and you go home the same day. Before you leave, make sure you have clear instructions: what symptoms to watch for, who to call, and when to go directly to emergency care rather than waiting for a callback. The first few days at home are when infections most commonly appear.

What antibiotic is given before a prostate biopsy?

The antibiotic is chosen based on your rectal swab, taken a few days before the procedure. The swab identifies which bacteria are present and which antibiotics they respond to, so the prescription is specific to you rather than a standard one. This approach is recommended by NCCN and European Association of Urology guidance because resistance to common antibiotics is now frequently found.

How do I know if my fever after a biopsy is serious?

Any fever after a prostate biopsy should be treated as potentially serious until your team has assessed you. There is no level below which you can safely wait at home. Fever is the earliest signal, and the infection behind it can progress quickly. Call your team the same day. If you feel very unwell, have uncontrollable shivering, or cannot reach your team, go directly to the emergency department.

Will I need to be admitted to hospital if I get an infection?

It depends on severity. Mild infections identified early may be managed with oral antibiotics without admission. More serious infections — particularly those with fever, chills, or any sign of sepsis — need intravenous antibiotics in hospital. The earlier you seek care, the more likely a less intensive treatment will be enough. That is another reason not to wait and see.

Is a prostate biopsy done as day care at CION?

Yes. Prostate biopsies at CION are performed as day-care procedures. Before you leave, your team will give you instructions about what symptoms to watch for and how to reach them if anything develops. If you have fever, chills, or worsening pain in the days after your biopsy, call your CION team or go to your nearest emergency department.

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