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Melanoma skin cancer sign: Border that is irregular

A normal mole and a mole with a ragged, notched border.

Melanoma is the most serious type of skin cancer. The most important warning sign of melanoma is a change in the size, shape, or colour of a mole or other skin growth, such as a birthmark.

  • Border irregularity is one thing to watch for. Call your doctor if any skin growth has developed ragged, notched, or blurred edges.

Current as of: March 1, 2023

Author: Healthwise Staff
Medical Review:
Kathleen Romito MD - Family Medicine
Adam Husney MD - Family Medicine
Amy McMichael MD - Dermatology
Donald Sproule MDCM, CCFP - Family Medicine

This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

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