not from smoking the cigars, but from my sinuses. Knocked me out of commission for the past few days. Fever of 101. This IS a cigar question...I had no problem with my sinuses until I read about and started retrohaling with the smokes. Once I did that, I got a major sinus headache and could feel a soreness behind my throat, like a sore throat but not IN my throat...more in the nasal cavity towards the back. Could the smoke have caused this? It's not fun driving with a fever...lol.