<s>[INST] Iam 56 yrs.old working lady and my height is 5 3 . From the last six month, i am having severe pain in left knee. I have got x-ray of both knee, in left knee gap is seen thin as compared to right knee while walking or standing i am receiving severe pain in my left knee.pls. advise. [/INST] Taking your age in consideration and considering your x-ray picture described by you, I am of opinion that you are suffering from osteoarthritis.It's an age related condition and tends to worsen with activities. Treatment for this condition is both non-operative and operative. Usually people are managed non operative by exercise to strengthen muscles around knee, lifestyle modifications like not to sit cross-legged and abolishing or modifying activities which cause stress in knee joint, Use of walking aids like walking stick and adequate pain relief.However, if nonoperative treatment fails and pain is so severe that affect patients life activities very much we advise surgery In my opinion please visit orthopedic surgeon so that he can assess you clinically, radiologically and provide appropriate treatment considering severity of your illness. </s>