Punch Biopsy

A Punch biopsy

An example of the punch tool that is used during the punch biopsy procedure.

Credit: DermNet NZ

Introduction to Punch Biopsy

A punch biopsy is used to diagnose certain skin conditions like rashes and deep skin growths that aren't on the surface. This procedure involves numbing the skin with local lidocaine and using a punch tool to remove a plug of skin from the affected area. The resulting hole is typically closed with one or two stitches and will leave a small line scar. The stitches need to be removed in 7-14 days, generally during a follow-up appointment to discuss the biopsy results and treatment plan.

After the Procedure

  • Immediately After: A pressure bandage is applied to the area, which should be kept dry and covered for 24 hours, avoiding showers until the next day.

  • Daily Care: After the first 24 hours, remove the bandage, wash the area with soap and water, and apply Vaseline or Aquaphor. Cover with a bandage or nonstick dressing like a Telfa Pad and hypoallergenic Hypafix tape. Repeat this process daily until suture removal.

Complications and Solutions

  • Infection: If you experience symptoms like excessive redness, pain, oozing pus, or fever greater than 100.4°F, call your doctor, as it may be an infection related to the procedure.

  • Bleeding: Bleeding can occur, especially if you are on blood thinners. If so, hold pressure to the area without looking for 20 minutes. Over-the-counter coagulants like BleedStop may help, and you may want to have it on hand before the procedure. If bleeding continues, contact your doctor's office.

Additional Information

For more detailed instructions, please refer to the biopsy instruction sheet provided by your healthcare provider.

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