I have a low tolerance all the time, 2 days ago i found my old pipe in the woods and it had a tiny bit of resin left, and i smoked it and got high. and my friend couldnt beleive that i got high off of it.....but that would make sense, cuz your not getting that much thc so your body might lower its tolerance cuz u dont use as much as you normally would so over time u get higher.....if u get what im saying