I had my left knee replaced 1 week ago. When I came home everything was going good till 3 days ago when i awoke to a very painful calf and shin bone. The shin is warm to the touch and very red with some swelling in it and the calf muscle. I am not able to put any pressure on it and it is very painful to even set it on the floor or stand but gets better when propped up. This morning I awoke to find a blister on my thigh and it has gotten larger as the day has went. Later today I found another blister forming on the other side of my thigh.