Within the last week I have developed a painful, reddish lump on the back of my neck, very slightly to the right of the second vertebrae. It is right in the line of a normal T-shirt collar, so it is continually irritating me. It is not particularly noticeable, unless one is looking for it, but as I said, seems somewhat inflamed. It is very hard, not like a pimple, pea-sized, and quite painful to the touch. It seems to be under the skin. If I squeeze it, the pea-sized lump turns white. There is a tiny black dot in the center of the lump, most noticeable when I squeeze the lump and it turns white.
While I can't be certain of any causal relationship, the development of the lump started almost immediately after a particularly extended period of barbell squats in the gym. I got tired and rested the bar (inappropriately) on my neck instead of the top of the traps. It was painful at the time, but easier, so I persisted. The bar was resting almost precisely where the lump currently resides.
The lump is continually causing me pain. Any help or insight someone can give on this issue would be greatly appreciated. If it would help, I can provide a picture.
Thanks!