I have Osgood-Schlatter Disease ie growing knee pain pls hlp?

i need to sit for 6 hrs daily in the coaching cl .doctors have advised me rest but that is not possible or i have been applying diclofenac gel and a tablet (each day) containing paracetamol and nemisulide .i have been taking these tablets for about 2 months now . I have read about its side effects on liver i cannot continue them for so long? Pls suggest me some home remedies?