A sudden or continuous change in the appearance of a mole is a sign that you should see your doctor. The ABCD rule can help you remember the symptoms of melanoma:
A for Asymmetry. One half is different than the other half.
B for Border Irregularity. The edges are notched, uneven, or blurred.
C for Color. The color is uneven. Shades of brown, tan, and black are present.
D for Diameter. Diameter is greater than 6 millimeters.
Other Warning Signs:
• The appearance of a new bump or nodule
• Color spreads into surrounding skin
• redness or swelling beyond the mole
• pain
• tenderness
• itching
• bleeding
• oozing
• scaly appearance