You should have this checked. You may have a deep tissue abcess that will continue to "grow" until it becomes visible as swollen tissue. My son had a similar issue recently and what started as a sensitive shoulder wound up being 3 days in the hospital with surgery to drain the abcess and remove necrotic (dead) tissue. Dressing, drying after bath, hugging etc. hurt him...and I (being the "wise" mother) poo-pooed it as "nothing" until the goose-egg sized lump appeared on his clavicle.
Abcesses are not dangerous, but they can be painful, and a doctor will know how to treat it.
Yep - get it checked - NOW!! -
I've let things go on in the past and my worry is the effect of any infection on your health generally and heart rhythmn in particular.
best wishes
dave
Hi. I had this and it turned out to be 15 gallstones in my gallbladder. Had it out and no more pain there!
Cindy
Sorry, I just read your note again and mine was under the breast. I do have pain at the top also but it is on both sides. It is fibromyalgia. Doesn't sound like what you have. Sorry, I am no help! Good Luck and keep posting, so you can hep others also.