Good morning, my husband recently ( 1 month) had surgery performed on his knees. The knees were cut open and, by the looks of it, they have reconstructed the knees with stainless steel or titanium, on the inner knee. His query is, should they feel numb? When he kneels down on them (briefly mind you), he says they feel really numb. He is doing all the exercises the physio has given him to do, and he sees the physio every fortnight as well as using a circulation booster. Will this numbness go away at all?