How to spot skin cancer

One half of a mole or birthmark does not match the other half.


The edges of a mole or spot are uneven, scalloped, or poorly defined.

Border irregularity

The color of a mole or spot is not uniform. It may have different shades of brown, black, red, blue, or white.

Color changes

The size of a mole or spot is larger than 6 millimeters (about the size of a pencil eraser) or is growing in size.


Any changes in size, shape, color, elevation, or symptoms of a mole or spot over time should be monitored closely.


Moles or spots that itch, bleed, or develop a crust may be concerning.

Itching, bleeding

Skin lesions that do not heal within a few weeks or develop into open sores should be examined by a healthcare professional.


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