I smell cigarette smoke almost constantly. This has been going on for 10 days. Two years ago I experienced the same thing - it went away after about a month.
No one smokes in my home or at my job or in my car.
I haven't made any recent changes in diet, medicines, makeup, etc. I don't wear perfumes or use scented laundry products, etc because I am highly sensitive to smell.
Any ideas of cause or cure?