The moles are in most cases benign and they will cause no threat to your skin or the rest of your body. However some moles can be problematic and they can cause problems. If there are cancerous cells in the mole you will have to remove it. Even if you have other problems with the mole you will have to have a surgery and remove the mole in order to prevent any other complications that can occur. How long have you been having this problem? Have you seen your doctor yet? You can do a biopsy of the mole in order to see if everything is fine with the mole. I hope this helped a bit.