My husband had a hip replacement three years ago, his father has diabetes, he is overweight and recently his knew turned white , (the same leg which he the hip replacement) a few days later, his food and ankle was bruised and his lower leg was swollen. He also became ill at the weekend after drinking quite a small amount of alcohol. Quite unlike him. I've tried to get him to have it checked out but he's refusing. Do you have ideas what this could be.