Daylight a huge problem in General Board Posted December 13, 2016 I've heard of sunlight being a (on the rare side) trigger for CH. Personally my eyes have grown sensitive to sunlight during hits and from spending 99% of my life indoors due to CH. Triggers I come across outside is cigarette smoke and certain heavy perfumes. Walking my dog is a game of eagle eye smoker spotting and holding my breath when such people pass me by. If sunlight is truly the trigger itself, how about some really big and dark sunglasses? A good uv filter on the glasses might ease her troubles a bit?