Today while taking a shower, I noticed a lump under
my skin. It is under
my left clavicle, between my shoulder and sternum. Looking at pictures of the lymphatic system, it looks like it could be a swollen lymph node. Because of the location, it looks to me like it could be a swollen axillary lymph nodes (levels III?).
I did some research about cat scratch disease, Hodgkin's, etc... here are some of the symptoms I have had.