Skin biopsy removes cells or skin tissue for diagnostic purposes and removes minor abnormal tissue. Local anaesthesia is used to numb the target area. It is usually done in 3 ways:
- Razor: a razor is scraped over the skin ⅔ times to collect enough superficial layers for testing
- Punch: a circular tool that removes skin and inner layers
- Incisional: the blade is used to make an incision and remove the target skin area.