I have a large ish ganglion at the top of my wrist. It's been there a month+ painlessly but now the joint is really sore when I wave my wrist around. GP (I went when it didn't hurt) said it will go eventually on its own but I'm concerned it's now sore. It's not my writing hand though fortunately. Nb, I'm only 30, apparently young to have one. What treatment can I have? (No chance I'm smacking a bible on it).