okay... I don't think I can use too much lighter, because I usually smoke joints. I can understand the pain if i'm using a pipe, which I do sometimes, but usually it's a joint. I dont' think there were any stems in the one I smoked just recently, because I broke it up myself. I really dont' understand this because it's like the worst pain ever and it lasts for a long time. I can't find anything about it online at the moment either. Anyway I think I will try taking a break and then smoking less next time I smoke, although I havent been smoking a large amount anyway.