27 YO male. Been tested a few times with negative test results for HSV 1 and 2 IGG tests. However, from time to time, I get these little sores on the very corner of my mouth (generally on the right side, VERY small, and singular). They don't hurt terribly bad and don't really leave any crusting. Sometimes they are tender and red, but generally not painful (barely noticeable most of the time). I was curious to know if this has happened to anyone else and they found out what it was? I don't think it's herpes, but it shares some symptoms.
I'm fairly sexually active, but I am very cautious as to whom I sleep with, always wear condoms, and give a good check of someone's oral region before I engage in anything. Thoughts?