Melanoma skin cancer sign: Asymmetry

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

• Asymmetry is one thing to watch for. This means that one half doesn't match the other half. Call your doctor if you notice that:
  • One half of a mole doesn't match the other half.