Medically reviewed by Sameena Zahoor, MD Pain under your left rib cage or breast is common, especially after eating or while ...

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.

3. Discomfort or pain below the right rib cage Dr. Sethi points out that any persistent discomfort in the upper right side of your abdomen shouldn't be ignored. "Discomfort or pain below the right ...