Sometimes i have a pain starting under my left brest and passes to the under arms and then to arms.what is this and why this happens?

Arthritis: It coUld be due to arthritis eithwr in your spine or shoulder, due to nerve compression.

911: Lots of things can cause arm pain with chest pain such as anxiety. But in my experience rule out life threatening issues such as heart and lung problems first. Call 911 and go to the emergency room please

Severl Possibilities: It is best that you be evaluated by your doctor who can evaluate several possible causes including but not limited to angina, costochondritis, radiculitis, thoracic outlet synrome, muscle spasm/strain, GERD,other cardiac and vascular causes just for starters. Presuming the workup confirms the cause is musculoskeletal massage, stretching and strengthening could help. Keep us posted.

Rib cage: The problem may be a pinched intercostal nerve which runs between two ribs. This pain is usually sharp and worse with a deep breath and radiates around the rib cage but not usually down the arm. See your physician if this symptom persists and he/may order an x-Ray of the rib cage and lungs for further evaluation.