I'm not exactly sure what's happening to me I worried of herpes, but there are no blisters. I use Burt's Bees original lip chap to keep my lips morturised. The corner of my mouth just one side is steady tingling. I don't know what to do I was tested for everything a couple months and again last week except for herpes. That's probably why I'm freaking out a little but no blisters, could this be something else. I'm also on antibiotics for UTI and BV. That's two antibiotics at the same time. Could that be why? I need help I'm constantly looking things up online. Have appointment today.