Hi everyone, Had my first cortisone shot ever on my bad knee back in early-January. It's starting to get a little achier now. I'm torn on whether I just get another now to stay ahead of the curve or wait until I really need it. Is there any science behind each cortisone shot being less effective simply due to too many shots? Or, is that based on the fact your knee just keeps getting worse? I only know that they want to do them no less than 3 months apart. Thanks!