Suggest Treatment For A Torn Mole Over The Breast

I have had a mole on my breast most of my life, the other day when I got in the shower I felt an awful sharp sting and pain...with soap in my eyes I first thought it was a tick, but then realized it was my mole and it was partially torn off. This morning it happened again and it tore off when I grabbed at the pain. It was stinging and painful...but seems to be ok now. IS IT? Or is it something I should have checked out. I still have the piece that tore off in saline in a baggie. Its about the size of a small pea.