I inhaled clorox fumes and when I did, I felt a bad brain freeze or burn. Ever since, when I draw breath, I inhale smoothly only to a point, and then the breath hits speed bumps or continues in steps, if that makes sense. And, from time to time, I have a pain in the back of my head. It has improved a bit over time, so I have assumed there is no permanent damage. Your thoughts would be greatly appreciated. Jay