A hiatal hernia – a rarer cause of pain under your left breast—is when your upper stomach bulges through the diaphragm, which separates your abdomen and chest, per Mayo Clinic. The painful sensation ...
Psoriatic arthritis, or PsA, is a chronic, autoimmune form of arthritis that causes joint inflammation and occurs with the skin condition ... This is referred to as dactylitis. Pain and stiffness in ...