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As a dermatologist, I examine skin all day, every day. If I see something concerning on your skin, I may perform a punch biopsy to learn more about it. A punch biopsy is a minimally invasive procedure that takes a sample of your skin to check for signs of disease.    

Here, I’ll answer common questions about punch biopsies.

Typically, we’ll do a punch biopsy if we see a rash...