In some cases, left arm pain is one sign of a heart attack (myocardial infarction), which is a medical emergency. This article discusses some of ...

Dull pain in the left arm that comes and goes can be due to a pinched nerve, injury, or CTS. It can also indicate a heart attack, which is an emergency.

Carpal tunnel syndrome is a common condition that causes pain in the hand, wrist, or lower arm. The pain can feel like tingling, throbbing, numbness, stinging, or burning.

A "throbbing" pain in the leg or arm can be a sign of a blood clot. (Image: Getty Images) WebMD states: "The feeling can range from a dull ache to intense pain.