Skin moles are classified as tumors, and are the most common tumors in humans.
Most people develop skin moles within the first twenty years of their lives, and most adults can have as many as fifteen or more moles on their body in various places, which makes them extremely common.
The majority of moles are harmless and the only problems they pose are cosmetic.
There are however, some that can be precancerous which means, they can turn into a dangerous type of cancer and the only person that can diagnose whether the growth is dangerous or not is a physician.
If you have tried over the counter mole removal remedies and the mole keeps coming back, it can be an indication of one of two things.
First, the remedy does not work in completely eliminating the mole or second, it could be melanoma, a type of skin cancer.
In a case where the mole keeps returning, it is advisable to see a physician to have it properly diagnosed to be sure it is not cancerous.
With any growth if you are not sure what it is or what is causing it you should seek advice from a physician immediately.
If it is cancerous the sooner it is caught, the better chance of treating it successfully.
Some or all of the qualities or signs skin moles can possess are as follows: (This is not a complete list, just the most common.
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• The mole is larger than a pencil eraser
• The mole bleeds spontaneously (without warning)
• Inflammation of mole changes without influences of external factors
• Mole shape or color is inconsistent
• The mole is constantly painful or itchy
• The mole changes in size and color

Whether your skin moles are showing any of the above signs or not, if you are concerned as to whether they are dangerous, seeing your physician as soon as possible can put you at ease, and if they are dangerous, then sooner you catch it, like I mentioned previously, the better the chance of treating it successfully.