I would think that pesticide or even late fertilizer absorption might produce such sypmtoms. Also, if you are smoking it, you might be having an idiosyncratic reaction to oxygen deprivation. Do other people who smoke the same weed have the same symptoms?
Yea It has happened to me when I smoke some good weed. It occurs when the high starts going away I feel very uncomfortable I feel like I can't breath right.

hi guys, does anyone know why some amatuer homegrown can cause headaches.
You probably did not flush it right or maybe the weed had a intense high. I know a few people that get that when they smoke some dro.:jointsmile: