from time to time get these little ulcers on the inside of my bottom lip and some times on my cheeks. they last for a day, then go away. they do not hurt or burn. I can just feel them when I rub my tongue over them. I was just wondering if anyone could help me out. i think they might be herpes. but I’m praying they are just cancker sores. I have been diagnosed with hsv1, but I have never had a cold sore. please any help will be appreciated. thanks in advance.