Suggest Remedy To Relieve Knee Pain While Folding Knees

Hi Doctor, I am 30 years old male. I am suffering from knee problem in my left leg for 1 years. While running or walking pain does not happen. It happen only when I try to sit in posture(crossed leg folding) even normal folding of leg also. Six month before when I started exercise in jim for 2-3 months only, the pain reduced 70-80%, then left doing jiming, slowly pain increased now.

Please suggest me that whether I should start exercise or should I consult a doctor. By pofession I am Software Engineer.

Many Thank

I Ahmed