I have severe leg pain from the last six months. What could be the reason?

Hello,

Welcome to icliniq.com.

From your description, I feel that you have patellofemoral compression pain, which gets worse on going up and down stairs. After a period of rest, you may feel severe pain in the the knees, but as you walk the pain will ease. I suggest the following:

1. Take Voveran SR (Diclofenac) 75 mg twice a day for two weeks.
2. Under the guidance of a professional physiotherapist, do quads strengthening exercises of the closed chain type, hamstring stretches and core strength exercises.
3. Avoid squatting or using the Indian style toilets.