Your question is not complete. Please give the description about site of pain but if its in the knee joint it can be due to osteoarthritis. Physiotherapy is a conservative treatment without any side effects and very helpful for such kind of patients. .
Next Steps
Go to a physiotherapist.. Ultrasonic therapy +IFT +Heating therapy +exercises will be helpful.
Health Tips
At home.. Rest +hot water fomentation +pain killer gel +no long standing +no squatting +no stair climbing +no cold exposure +do static cycling.