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Preparing for a biopsy

Skin Prep and Hygiene — Before Your Biopsy

Getting the skin ready before a biopsy is simpler than most people expect — but the mistakes are easy to make and occasionally cause the procedure to be postponed on the day. This page tells you exactly what to do and what to leave alone.

Medically reviewed by Dr. C. Raghavendra Reddy, Medical Oncologist, MBBS (Gold Medal) · DNB · DM (Medical Oncology, Gold Medal) · Last reviewed September 2026

  • Do not shave the site — Even a small nick raises infection risk at the exact spot that will be punctured.
  • Wash with plain soap — No antiseptic, no scrub, no exfoliant — plain soap and water the morning before you leave.
  • Nothing on the skin afterwards — Creams, lotions, oils and deodorant must all be off the skin when you arrive.
  • Confirm with your centre — Site-specific instructions vary. Your centre will tell you anything additional when you book.
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Do not shave the biopsy site in the days before your procedure — small cuts raise infection risk and can lead to cancellation. Wash the area with plain soap and water on the morning before you leave. Remove all creams, lotions, perfumes and oils from the skin. Your centre will confirm any site-specific instructions at booking.

What to do and what to avoid before your biopsy

AspectWhat to doWhat to avoid
ShavingLeave the skin untouchedRazor, wax or hair-removal cream in the 2–3 days before
Washing the siteWash gently with plain soap and water on the morningScrubbing, exfoliating products or loofahs on the site
Skin productsApply nothing after washingMoisturiser, sunscreen, oils or body lotion on or near the site
Deodorant and perfumeSkip these near the biopsy area on the dayDeodorant, perfume or body spray anywhere close to the site
ClothingLoose clothing that gives easy access to the siteTight waistbands, underwire, or layers that are difficult to remove

Should you shave the biopsy site?

No. Do not shave, wax, or use hair-removal cream on or around the biopsy site in the two to three days before your procedure.

Even a small nick in the skin raises infection risk at the site — and that risk matters most at the exact point that will be punctured or cut.

If the area genuinely needs to be cleared of hair, the team will do it themselves using a clinical clipper, not a razor. You do not need to prepare for this in advance.

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What about creams, lotions and deodorant?

Remove all products from the skin on the morning of your biopsy. This includes moisturiser, sunscreen, body lotion, oils, deodorant and perfume.

Products on the skin can interfere with cleaning the site before the procedure. They can also affect how dressings and marking pens adhere.

Wash the area gently with plain soap and water. Pat dry with a clean towel and apply nothing afterwards.

What to do on the morning of your biopsy

  1. Shower or wash as normal

    A regular shower is fine. Do not skip washing, but do not scrub the biopsy site.

  2. Wash the biopsy site with plain soap and water

    A gentle wash is enough. Use your hand rather than a sponge or flannel directly on the site.

  3. Pat the skin dry

    Use a clean towel. Pat rather than rub to avoid irritating the skin.

  4. Apply nothing to the site or nearby skin

    No lotion, oil, moisturiser, deodorant or perfume near the area. Leave the skin clean and dry.

  5. Dress in loose, comfortable clothing

    Choose something that gives easy access to the biopsy area without needing to undress fully.

  6. Leave at the time your centre confirmed

    Arriving on time allows the team to complete checks and skin preparation before the procedure begins.

Did you know?

Any break in the skin — including a small shaving nick — creates an entry point for bacteria at the exact site that will be punctured during a biopsy.

The team will clean the skin properly when you arrive, but they cannot undo existing skin damage. This is why guidance recommends against home shaving before skin-penetrating procedures.

Source: WHO Guidelines for Safe Surgery and Surgical Site Infection Prevention

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Common questions

Frequently asked questions

I accidentally shaved the area — will my biopsy be cancelled?

Not automatically, but tell the team when you arrive rather than hoping they will not notice. A clean shave from more than two or three days before is unlikely to cause a problem. A fresh shave with visible nicks or irritation is more likely to prompt a discussion, and in some cases the team may prefer to reschedule. Telling them gives them the chance to assess — not telling them is what creates risk.

Should I use antiseptic soap or a disinfectant wash on the skin?

No. Plain soap and water is what is recommended for home preparation. Antiseptic washes and strong disinfectants can irritate the skin, and some can interfere with the cleaning agents the team uses before the procedure. The team will apply the correct antiseptic preparation when you arrive — your job is simply to arrive with clean, product-free skin.

What if the biopsy site has a lot of hair on it?

Do not remove it yourself. If the hair needs to come off, the team will use a clinical method — usually clipping rather than shaving, which avoids breaking the skin. This is standard practice before skin-penetrating procedures and takes only a moment once you are in the room. You will be told in advance if anything special is expected of you.

Can I wear a bra or underwear if the biopsy is near the chest or abdomen?

Yes, but choose something without underwire, padding, or complicated fastenings near the biopsy site. You will be asked to remove or adjust clothing so the team can access the area, and loose, simple clothing makes that faster and more comfortable. If your biopsy is in a specific location, ask the team at booking whether you need to wear or avoid anything in particular.

Will the centre tell me all of this when I book?

Your centre will go through the preparation instructions specific to your biopsy type and site when you confirm your appointment. This page covers the standard skin-prep principles that apply broadly — but your centre's instructions are the ones to follow if there is any difference. If you did not receive preparation instructions, call the centre and ask before the day.

Full index

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