I had a 2 level PLIF and discectomey in Dec. A month ago my knee was swollen up and I called my surgeon. He said to see an ortho surgeon here as it is a 2 hour drive there. Well the swelling went away in a couple days. So I forgot it. Now for the past week it has swollen again. nd is painful. Can it be DVT this far past my surgery or not. Anyone have this happen?