my sister has a blister on her lip?

Question

last year, about this time of year too, my sister had these sores inside of her mouth. Now she is getting a blister-liket thing on her lip. Do you think this will turn into the problem she had last year? She works at the swimming pool as a lifeguard, so could it be because of that?

Answer 1

It is Herpes Simplex ~ cold sores.
It is a virus and once you have it you have it in yuor body forever. You can use Herpecin to heal them.
Your body reacts to vitamin C and also to sunshine. Those things, amongst others, aggrivate it and it errupts.

Answer 2

too much sun will cause such blisters. it sounds like a cold sore, and is caused by the herpes virus that lives in our nerves if we had chicken pox as children. Different things can trigger an outbreak, like too much sun, too much emotional upset, too much caffiene, the list goes on and on.