Sounds like you just have a crack
in the
corner of your
mouth, maybe from dryness. You can always tell about herpes, cause it's almost like poison ivy as a cluster of blisters form, and their will be a tingle with the itching. If a cluster of watery sores come up with a tingle, then chances are, it's a good possibilty that it very well could be herpes. If it itches, get some toothpaste and dab on it. Instantly stops the itch and it goes away within minutes.