Hi My Daughter Is Having Problems With Painful Cracks On

Hi My daughter is having problems with painful cracks on the side of her mouth. She is a swimmer and has been using vitamin e oil from and blistex. It is still bothering her. SHe is away at college. She is on a
prescription medicine for her stomach now . I forgot what it is but it starts with an Olm 40 mg. Not sure what else I should get her thank you