 [ Symptoms ] i am 5 day post op from a knee replacement and i have a few patches of red [ Disease ] hi have a good read of this link it could help understand your problems the link <link> 1fcigarette_smoking_and_sleep htm just copy this link into google to open and read but the real answer would be to pack up the smokes hard but can be done how do i know i did it18 years ago smoked from the age of 11 so yes it can be done good luck