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Redmond Regional Medical Center

Skin Biopsy


A skin biopsy is a procedure where a small piece of abnormal skin is removed for testing. There are 3 main types of skin biopsies:

  • Shave biopsy—outer part of affected area is removed
  • Punch biopsy—a small cylinder of skin is removed using a punch tool
  • Excisional biopsy—an entire area of abnormal skin is removed
Punch Biopsy
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Reasons for Procedure

A skin biopsy is used to test an area of abnormal skin. If possible, the entire area will be removed during the biopsy. A skin biopsy may be done to diagnose:

  • Bacterial, viral, or fungal infections
  • Inflammatory skin disorders, such as psoriasis
  • Cancer or benign skin growths

Skin biopsy may also be done to:

  • Make sure a tumor was completely removed—by testing remaining skin
  • Monitor the effect of a treatment

Possible Complications

Complications are rare. However, no procedure is completely free of risk. If you are planning to have a skin biopsy, your doctor will review a list of possible complications such as:

  • Bleeding
  • Infection
  • Poor wound healing
  • Scarring
  • Nerve damage

Factors that may increase the risk of complications include:

  • Smoking
  • Immunosuppression
  • Bleeding disorders
  • Circulatory problems

What to Expect

Prior to Procedure

No special preparation is needed for this procedure.


Local anesthesia may be used. It will numb the area being treated.

Description of the Procedure

The involved area will be prepared. The skin will be cleaned. Medication will be applied to the skin or injected to numb the area. The exact steps will depend on the type of biopsy:

  • Shave biopsy—A thin slice of the skin will be removed. It is done with a special razor that shaves off a piece of skin.
  • Punch biopsy—A special tool is used. The tip of the tool is pushed into your skin. As it is pushed down, the tool will be rotated into the skin. A circular sample of skin will then be cut free. This biopsy provides a sample from all of the layers of the skin. Stitches may be needed to close the hole.
  • Excision biopsy—The entire area of abnormal skin will be removed with a scalpel. This biopsy will make a larger and deeper hole in the skin. Stitches will be placed to close the hole left in the skin.

After the procedure, a clean dressing will be placed over the area.

How Long Will It Take?

5-20 minutes

Will It Hurt?

There may be some pain and discomfort after the procedure. Medication may be advised to reduce discomfort. .

Post-procedure Care

Keep the biopsy area clean and dry. Keep it covered with a sterile bandage for 1-2 days. Stitches will be left in the skin for 3-14 days, depending on where they are located. Ask your doctor when you can expect the results of the biopsy.

Ask your doctor about when it is safe to shower, bathe, or soak in water. Pat the wound dry after you have washed it with a mild soap.

Be sure to follow your doctor's instructions.

Call Your Doctor

After arriving home, contact your doctor if any of the following occurs:

  • Signs of infection, including fever and chills
  • Redness, swelling, increasing pain, excessive bleeding, or discharge from the incision site
  • Pain that you cannot control with the medications you have been given
  • Any new symptoms

In case of an emergency, call for emergency medical services right away.

Revision Information

  • American Society for Dermatologic Surgery

  • National Cancer Institute

  • Canadian Dermatology Association

  • Cancer Care Ontario

  • Pickett H. Shave and punch biopsy for skin lesions. Am Fam Physician. 2011;84(9):995-1002.

  • Skin biopsy. Nemours Kidshealth website. Available at: Updated July 2012. Accessed February 25, 2015.

  • Skin biopsy. DermNet NZ website. Available at: Updated December 13, 2014. Accessed February 25, 2015.

  • 6/3/2011 DynaMed's Systematic Literature Surveillance Mills E, Eyawo O, et al. Smoking cessation reduces postoperative complications: a systematic review and meta-analysis. Am J Med. 2011;124(2):144-154.e8.

The health information in this Health Library is provided by a third party. Redmond Regional Medical Center does not in any way create the content of this information. It is provided solely for informational purposes. It does not constitute medical advice and is not intended to be a substitute for proper medical care provided by a physician. Always consult with your doctor for appropriate examinations, treatment, testing, and care recommendations. Do not rely on information on this site as a tool for self-diagnosis. If you have a medical emergency, call 911.