Costochondritis. Costochondritis is the most common cause of.
Right-sided chest pain can be caused by many different conditions, that connects the ribs to the main breastbone in the front of the chest.
Sternum pain can be confused with heart attack pain. Learn more sternum pain, how to distinguish it from heart pain, and when to see a doctor.
Pain under your right breast may indicate a health condition, like Sometimes this pain radiates into the back, armpit, or up to the breastbone.