Nipple was completely covered this picture is just the upper half of my breast and this bump that appeared. It started off smaller and has gotten a little larger and read as you can see. I have palpated it there is no like hard lump underneath or anything and it is not overly painful or sensitive. My skin is very sensitive though and if something irritates a certain place I have had bumps like this show up before. Just in other areas like my bra line or hip and it usually scabs over maybe opens alittle then scabs and goes away. What is this? Anyone know why this happens to my skin ?