I get constant sores in my mouth on my cheeks, tounge, gums, and roof of my mouth. I take Valtrex for cold sore outbreaks and it really works for me. My doctor so far has told me you can't get herpes in your mouth so Valtrex won't help. But I know the swollen painful blisters in my mouth are caused by the herpes virus... My question is can I ask my doctor about suppressive therapy the sores are constant I have not been more than a week without an outbreak in 4 yrs. Its kinda destroying my life.