How to prevent osgood schlatters?

I got osgood schlatters about 5 or 6 years ago when I did Irish dancing but it went away after a few months once I'd seen the physiotherapist and was told to take it easy. I haven't been bothered by it since, until now. I've taken up running and can feel the pain in my knee. As of right now it's not too painful but I'm just wondering if there is anything I can do to prevent it getting any worse (I don't want to stop running, I'm training for a 10K) or should I go back to physio?