recently I discovered that the mole on my face\ cheek that's been there for many years, is slightly tender to touch, the size is probably the same as a eraser on a pencil, dark brown, circular in shape, no jagged edges or redness, no bleeding , no itching or pain, do I need to get it checked out , for skin cancer? I'm very worried also the scar it may leave on my face . please can someone advise me!! thank you kindly