<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I badly hurt my knee while playing football last evening. Its quite painful and I am not able to put weight on it. What could be the problem and what tests are needed?  <response>: Based on your symptoms, you may have injured your knee joint. We will need to conduct a radiographic imaging procedure such as a plain x-ray or magnetic resonance imaging MRI to assess the extent of the damage. Depending on the severity of the injury, we may need to apply a splint or recommend physical therapy exercises or other therapeutic procedures. Surgery may not be required and other non-OR therapeutic procedures on the musculoskeletal system may suffice. 