One Of The Most Painful Conditions Known To Man/or Woman..! in Diary of a 'Madman' A blog by NL Posted August 31, 2010 Hi NL. Pleased you got some answers and treatment to at least help you manage your condition. Did you ever get an answer as to why your CH is triggered in this late summer/early autumn period? Is it something thats related to fungi spores, all-be-it not affecting your sinuses? Or maybe its to do with changes in air pressure/temperature/dampness?