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The ABCDE mole check: warning signs of melanoma

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Melanoma is much easier to treat when it's found early. Anyone who has used tanning products, sunbeds or melanotan should get familiar with their skin and check it regularly. The American Academy of Dermatology's American Academy of Dermatology: ABCDEs of melanoma guide is the standard tool.

The ABCDEs

The "ugly duckling" sign

Dermatologists also look for a mole that looks different from your other moles. A spot that stands out is worth having checked, even if it doesn't clearly match an ABCDE sign.

How to do a self-exam

  1. Use a full-length mirror and a hand mirror in good light.
  2. Check everywhere, including the scalp, the soles of your feet, between your toes, under your nails and your back. Ask a partner to help.
  3. Take dated photos of moles so you can spot changes.
  4. Repeat monthly.

When to see a dermatologist

Make an appointment promptly for any new, changing, or unusual spot, or anything that bleeds or doesn't heal. Tell the doctor about any tanning bed use or use of products like melanotan, since this is relevant to your risk.

Related: melanotan, moles and melanoma · tanning beds and UV

Published October 25, 2026. Sources are linked in the text. See our Medical Disclaimer.