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Understanding Your Shave Biopsy

What to expect, and how to take care of the area afterward.

Watch: shave biopsy aftercare with Dr. Haque

This video uses an AI avatar of Dr. Haque. The script and medical content are his.

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What is a shave biopsy?

A shave biopsy is a quick procedure where a thin blade removes a small, shallow sample of skin so it can be examined under a microscope. It helps diagnose moles, growths, rashes, and spots that may be skin cancer. The area is numbed first, and no stitches are needed.

What to expect

  • We numb the area. You may feel a brief sting, then only pressure.
  • The blade removes a thin layer of skin. The visit is quick.
  • We place a bandage when we are done.
  • Your sample is sent to the lab. Results usually take about 1 week.
How a shave biopsy worksTwo-step cross-section of skin. Step 1: a thin blade glides horizontally beneath a raised lesion, cutting through the epidermis into the upper dermis. Step 2: the lesion sample is lifted off for the lab, leaving a shallow base that heals without stitches.blade glidesEpidermisDermisFat layercut planeLesionSample goes to the labEpidermisDermisFat layershallow baseheals, no stitches1 Blade glides just under the lesion2 Thin sample lifted offSchematic, not to scale
Left: the blade glides just under the lesion. Right: the thin sample is lifted off and sent to the lab.

Aftercare

  • Bandage: You can take the bandage off any time on the first day. Keeping a bandage on is optional.

  • Cleaning: Wash the area with soap and water twice a day.

  • Ointment: Apply an over-the-counter antibiotic ointment such as Polysporin, or an emollient such as Vaseline, several times a day to help healing.

  • Showering: You can shower any time after the biopsy.

  • Swimming: If you go swimming, cover the area with a waterproof bandage.

  • Exercise: No restrictions.

  • Sun protection: Protect the area from the sun while it heals to help prevent darkening.

When to contact us

Significant redness around the area, pus, or yellow crusting can suggest an infection. If you notice any of these, let us or your provider know. You may need antibiotics.

Common questions

Questions about your biopsy or aftercare? Contact your dermatologist or healthcare provider.

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