<s>[INST] I had right ankle surgery on 28 May and recently had cast removed. I am scheduled for pt in the next week. I have noticed that when I put both of my feet on the floor my right foot turns red. I don t have any pain because of it but it turns an obvious red color. I would like to know why it does this? [/INST] Hi, Thanks for contacting Chat Doctor. Many times after ankle surgery, the ankle itself or the foot will have a faint discoloration and edema compared to the other side. The body is still healing from surgery and the swelling can bring in some more blood to the area as well, both contributing to this look. It would be wise to have the physical therapist and surgeon look at the area as well to make sure this is the cause. I hope this helps answer your question. Thanks. </s>