Is this a cycling pain, Jogger, or generally?
Assuming it's cycling, one possibility is a bike set-up which puts too much weight on your hands e.g. saddle too high, bars too low. That is unlikely if it is something that has just come on.
I had something similar a couple of years ago, with discomfort in my forearms and hands while cycling. The physio diagnosed muscular imbalance and gave me this exercise - sit in a chair with your arm on the armrest and the wrist just over the end, grip a 16oz tin of beans or whatever between your thumb and little finger, raise and lower the whole hand to full extension of the wrist in both directions, do 40 or 50 repetitions several times a day.
After a couple of weeks the discomfort went and I have never had it again. Could be worth a try.
I would certainly see a physio if it has been going on for a while and you haven't done anything that could account for it, like doing a face plant at work.