Overuse of cannabis can cause something called cannabis hyperemesis syndrome. You have severe nausea, uncontrolled vomiting, and stomach cramping. It's caused by your nervous system, so people who have it tend to sit in a hot shower for a long time when they don't get relief from anti-nausea meds. Luckily, it clears up pretty quick with a shot of haloperidol, and as long as you cut back you can continue to partake.

It doesn't affect everybody and usually you have to smoke a lot over a long period of time, but I didn't know about it before and I think people should be aware.

Happy smoking, frients