Since I started HRT, I've felt phantom sensitivity and tenderness in the breasts area. When I attempt to verify this with my hands, I hadn't felt anything. Now while they don't feel any different to my hands, feeling my hands in that area is different for sure. Behind the nipple it is very sensitive to touch. The size of the sensitivity is about the size of the diameter of the shaft of a pen. The left one feels more sensitive than the right one, but both are sensitive.