I thought I had a bump from shaving. Ignored it for a week. It's sore when I tough it and seems deep. I closed my arm to see if I could still fill it and I did. I am curently going through menapause (3 mths no period) and am only 44. I heard it could be a blocked sweat gland. I also just had a mamogram and ultrasound of my breast doen recently. I'm scared that this popped up. Is it Cancer?

Kelly