I don't know how applicable to this situation my advice is, but generally the treatment for tennis elbow is rest, stretching, and then exercising.
There are two ways I've been told to stretch - first, hold one arm out in front of you, palm facing forward. Take your other hand and pull your fingertips back towards you. Then, do the same with your hand down and palm facing you, and push gently with the other hand back towards you. The second way is to stand next to something firm but with some give (i.e. a mattress or a table with a thin pillow). Put your hand flat on the surface, palm down, lean towards your fingertips and hold. Then change the angle of your hand (rotate it in a circle, stretching). Finally, repeat with your palm facing up. Both of these are essentially the same stretch, but just two different ways to do it.
Exercising is generally strengthening the forearm muscles, which is the culprit for tennis elbow. Doing exercises like forearm curls should reduce your susceptibility to tennis elbow.
Again, I don't really know if this is helpful at all, but I didn't really understand what kind of pain it is and I hope this helps a bit.