I experience a stabbing, take my breath away pain in my left hand in the area of the palm just below the ring finger. This pain is searing and does not last more than a few seconds. Sometimes within a brief span there will be repeated incidents. Sometimes there is only one incident. It happens irregularly. I have not been able to discern a pattern regarding onset. I have been fully examined by a doctor, an internist, and he did not identify the cause. In recent weeks, these incidents have occurred more frequently, though not every day.
What is causing this pain? What kind of specialist should I see?