I need to know I'm worried!

I do horse riding and I get cysts almost every month but this one I have now I have a strong feeling its from the riding as I only felt it and had pain the day after my riding, please help I want to know if my horse riding can cause my cyst??

Mine came from biking...both sides...one worse than the other. Had both glands removed a few years ago...no trouble anymore!! Am back to biking without difficulty.

Llori