The sternum, or breastbone, is the flat bone where the ribs meet. Sometimes, the joints can pop or crack as a person stretches or moves. A muscle spasm, an injury, costochondritis, and surgery are ...
In short: chest acne, also known as folliculitis, is caused when pores get clogged with oil, dead skin cells, and other debris. These clogged pores result in inflammation and the formation of ...