- Moles that asymmetric in shape
- Moles that have a border that is irregular
- Moles that are dark black in colour, or which have multiple colours in them
- Moles that are larger than the diameter of an eraser on the end of a pencil
- Moles that are evolving, which are changing size, shape or colour
Here is another article from MEC.ca on UV Intensity, Protective Clothing and Sunscreen