Why do I get sharp pains in my palm? I think it’s from using my computer mouse a lot. Prevention tips/cures?

A_H_lady asked:

using my cpu less is out of the question (all my schoolwork and professional work requires my being on it all day).
ive been doing little stretches pulling back my fingertips in a backwards arch motion, but the relief lasts seconds only, pain returns instantly. its like a numby warm constant pain that fluctuates up and down w/ sharper pains.