I underwent a knee surgery about 4 weeks ago and I was quite well till my last PT session. Then he made me work much harder than the previous session. After 2-3 hours from starting Pt, it started developing a sharp pain in my knees which made it hard for me to walk. I called my instructor and she put some ice on my knees. All these happened before a week. It still hurts me on Monday. So I made an appointment with my doctor and did a surgery. He told me that it might be some inflamed scar tissue that causes pain and gave a cortisone injection on knee. Also given was some pain killer pills. After 2 days, still it is sore and is very hard for me to walk. Now, what should I do for getting a relief from this pain? Is this pain normal? I am losing so much work due to this work. Please help me.