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By Mayo Clinic staffIn most cases, your doctor can diagnose plantar warts just by inspecting your feet. If there's any doubt, your doctor may need to pare down the lump with a scalpel. Plantar warts will show signs of pinpoint bleeding from their dark dots, which are really blood vessels.
If there's still doubt about the diagnosis, your doctor may remove a small section of the wart (shave biopsy) and send it to a laboratory for analysis.
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