I'm 11 days post op (bypass) and since the operation I feel cold all the time. Yesterday went out everyone had their hoods down on their car and t-shirts on. There was me car hood up and heating on wearing a thick wooly cardigan. Thought it might be the wolferin injections. Usually always warm-never wear a coat and the temp in my office is around 16-19 which I find comfortable (everyone else says it's too cold).