How big/deep are mole roots? Can they hurt around the mole? (Photo)

My concerns about my mole is that I noticed it’s a very sensitive on one side (see the pic.) if I press its hurts more. But if I don’t touch I still feel something is hurting - light pain on that side/area. It’s not even comfortable to sleep on that side (left) feels like something is pressing on something. And also when I sit down. Pain comes and goes. Probably the way I sit/lay or something. My mole is under my breast. Sometimes I put plaster on it so my bra can’t ‘scratch’ the mole off.