I recently discovered a problem with mouth burn. Not the typical tongue bit, but a general irritation of my entire mouth that was starting to make smoking quite problematic. After limiting my tobacco variations a bit and taking more notice, I narrowed it down to Smokers Pride Rum Cured. Looks like a sensitivity to some ingredient within. Really to bad as I bulk bought this particular blend/topping. I find their other blends don't give any issue, but just 1 bowl of this ruins smoking until the next day at least.