Lysine versus my aphthous ulcer

Canker sores are a pain. I've had one on the tip of my tongue for the past couple of days. I've never broken a bone, but I'd almost rather have a broken leg. Finally went to Walgreen's and purchased some L-Lysine (see picture of amino acid on left). It seems to be helping already.

Some think these are caused by sugar intake. Actually, they appear to be more likely caused by stress, anxiety, or sleep deprivation. At least, that is what I choose to believe. This way I can have a good excuse for more sleep and keep the sugar in my diet.