I'm pretty sure it is when you ribcage is stuck to your lung, a way to help it is by sticking your finger where is hurts (push hard) and breath deeply this works all the time.
Stop taking caffeine in coffee, soda, and chocolate. This has helped me reduce the frequency of lumps in my armpit. Now, I get lumps only when I treat myself to chocolate (I go caffeine free with...
This could be a cyst or a boil forming--go to Doctor and check it out.It possibly means that you sould consider seeing a doctor. It could be breast cancer, or it could be a very swolen lymph node, or...