So in the 3 years ive smoked (im 17 now) weed ive noticed something with increased/decreased usage. When i increase my intake of marijuana i notice that i get more facial acne, and when i decrease my usage i get less acne. Now i dont have acne that bad just a few zits here and there but my friend has it pretty bad. We have both talked about this and the same happens to him too (more weed = more acne). I understand that at my age acne is common but its the appearance and disappearance of it when marijuana is factored in. I have not stopped smoking to see if marijuana is the culprit. Is it just me and him who have this or is it because of a chemical of marijuana that causes this?