3. Bleeding
Any mole that you have on your body should not bleed. If you happen to cut a mole open with something that is a different story. However, if you do not do anything to the area that the mole is in and it starts to bleed it is a warning sign that something is wrong.
Moles normally will not bleed, so it is a sure sign of trouble. Moles that are infected or if there is something wrong with the area surrounding a mole, it may become itchy. When you scratch the area you may cause it to bleed.
If you have an area on your skin near a mole that becomes itchy and bleeds when you scratch it, you need to go to your doctor as soon as possible. There is a good chance that there is something wrong. While it may not be cancer, it could be another type of skin issue.