It also connects to muscles in the chest, arms, and around the rib cage. There are many causes of right-side pain under the armpit, including muscle strain, infections, or skin conditions.

When gastrointestinal problems occur, then also there can be a problem of chest pain. Let us tell you that pain below the ...

If you feel sharp, stabbing chest or shoulder pain when breathing in deeply ... feel like a pulling or tearing from the diaphragm right below the left breast, Dr. Nazareth says.