It is too early an age to develop osteoarthritis. But there seems to be increased pressure over the knee joints considering your height and weight.
It would be better to start exercises to reduce the weight and increase the strength of knee joint muscles.
Next Steps
Pls start with hot fomentation, take analgesic tablet for pain relief, start
calcium and
vitamin d supplement, start Physiotherapy..
Health Tips
Avoid heavy work avoid sitting down avoid Indian toilet, avoid stair climbing and descending..