does anyone suffer from this. its basically canker sores that keeping coming back. well that's what I understand... I think I might be getting this. for the past several months I've been getting canker sores at least once a week or so. it's been driving me crazy. they dont hurt and they just show up lasting for a day or so then go away. there is no crusting, bleeding or any pain. I wont have anything for about 3 days then when I wake up and i can feel and see the sore on the inside of my bottom lip. I've told my doctor and now he wants me to take Valacyclovir..here is what it usually looks like.