Welcome to HCM.
The recurrent attacks of yeast infection indicates that you might have an in adequate treatment. Sometimes you may need a course for at least 3-4 weeks.You have to look for certain predisposing factors like taking oral contraceptives, prolonged antibiotic therapy, immuno-suppressive drugs like steroids
etc., presence of Diabetes
. You have to look for these and try to control the same if possible to have a high success rate. The partner also to be examined and treated.
The blisters are not indicating longstanding infection rather a more severe form of manifestation.
Nothing to worry. Your physician can tackle the same and provide you a total cure if you follow his/her instructions.