How do I know if a mole is cancerous?


The vast majority of moles are not dangerous, especially those that appear in childhood or before the age of 30. The moles to be concerned about are those that appear after the age of 30. Also look for changes in a mole’s color, height, size, or shape. Additionally, see a dermatologist if a mole bleeds, oozes fluid, itches, or becomes painful.

Other signs that a mole is cancer:

  • Border is ragged or irregular.
  • Color is not uniform, with shades of tan, brown, black, blue, white, or red.
  • Size is larger than a pencil eraser.
  • Changes in size, shape, or color.
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