Asymmetry – a growth with unmatched halves;
Border irregularity –ragged or blurred edges;
Color-a mottled appearance, with shades of tan, brown, and black, sometimes mixed with red, white, or blue;
Diameter – a growth more than 6 millimeters across (about the size of a pencil eraser), or any unusual increase in size.
Evolution – a growth that has been changing or evolving in any of the above in the recent past
If all these variables sound confusing, the most important thing to remember is this: Get to know your skin and examine it regularly, from the top of your head to the soles of your feet. (Don’t forget your back.) If you notice any unusual changes on any part of your body, have a doctor check it out.