If the arthritis have already developed its not reversible by medication alone, it’s unlikely to have osteoarthritis at this young age, you can get pain relief by medications , proper clinical and radiological examination has to be done, to get sure of osteoarthritis at this age
Next Steps
Have a standing xray ap of both knee ap and lateral, reduce weight if you are overweight and have a proper diet
Health Tips
Stay active , do quadriceps strengthening exercise ofter! You will have good results hopefully!