<s>[INST] I just had hip surgery and my physical therapist said that when they got in the joint they saw bone discoloration. She wasn t able to explain much past that. Do you have any ideas about what it might mean? The surgery involved fixing a labral tear and sanding some bone down as well. [/INST] Hi, Firstly, sorry to hear about your hip surgery. Coming to the point, that bone doesn't get discoloration, and also it is difficult to see from outside. It should be the skin which the therapist might be trying to explain you. As to see within the joint and the bone you either need a CT scan or an X-ray.  Since surgery is done recently, I feel you should consider meeting the surgeon to get it assessed as he will be the right person to work on this complaint as he is the one to operate too, so he knows what he has done and why this has come. But I strongly feel this will be changes related to the skin and will be a part of the healing process but still rather to ignore it is better to get it checked. There is no harm getting checked right? Hope I have answered your query. Let me know if I can assist you further. Jay In Chat Doctor.  </s>