I am happy to report that my sense of smell has returned to normal. As reported in early March, I noted that I had a persistent scent of concentrated tobacco smoke lingering constantly in my nostrils. It seemed to intensify when I was doing my yoga practice, especially when in inversions. By about a week ago, the smell had abated to a kind of faint pine tar smell, and this weekend it completely disappeared. As suggested in my previous post, I think that I was opening up some blocked sinus cavities, which was clearing out old nicotine-saturated mucus from my previous incarnation as a cigarette smoker.