dear stephen,

I agree with physiobob

in normal practice I assess the patientīs history, check his elbow, shoulder and all other parts that might be part of /or likely to be causing the problem first.

Then, if:
- there is no response to my initial therapy
- there are no skin- organ zones or complaints that would suggest I have to look into the organs/meridiaan bit,
then I would very much like to look at your techniek and your posture during your work. This because some people, especially if they are working under time-stress "hold their breath" during their work. They are in a permanent state of "inspiration" having breathed in... lifted their ribs and staying in that position (which can irritate nerves and vessels going to your arms).
I must say this is something I normally look for initially. It happens quiet often.

I would say you have already landed into this last phase.....
Go to a good physiotherapist..... have these things checked and video tape you techniek and your posture.

Good luck

Esther