<s>[INST] I tripped in a truck stop and my knee came down on the edge of a stone staircase. hurt terribly at first but I can walk around just fine with no pain. put all my weight on the leg. at the first day it felt like a part of my knee under the knee cap inself near the tibia pplateauwas missing. but on day 2 it was there. just dented. its only painful if I put pressure directly on it. Did I actually break my tibia, or rather fracture? I dont understand how I can walk around so easily if so. no bruising or swelling. [/INST] Hello, I have studied your case. As per your history and your activity possibility of stress fracture of leg bone can be considered, or only tibia contusion may be present. So I will advise taking an x-ray and should look for stress fracture. MRI scan will help in confirming diagnosis. Stress fracture may require immobilization in plaster or brace. I will advise consulting orthopedic surgeon if possible otherwise take rest for 2 weeks. Hope this answers your query. If you have additional questions or follow-up queries then please do not hesitate in writing to us. I will be happy to answer your queries. Wishing you good health. Take care </s>