haedaches and homegrown

hi guys, does anyone know why some homegrown causes headaches

its not the fact that its homegrown that is causing a headache, cause i mean if you think about it just about all weed is "homegrown" in some way or another. It's just how that type of weed is reacting with your body on that certain day. I've gotten a headache from shit mids but also good stuff like kush. So it just depends really, you could get a headache from just about anything depending on the day.

What I think is actually happening here is that it's not that it's homegrown, but the weed wasn't flushed properly. I'm fairly certain the nutes are what is causing the headaches, and that is why good growers recommend a two-week flushing period before harvest, so the bud is all natural.

its "the munchies "that gets me at the hg level not the headache
also the harshness is ruff on the froat!