My wife get this blisters on her lips frequently i.e 5-6 times in a year . This start with tingling sensation then it starts becoming red then blisters comes out. Then it pains alot until blisters get burst, it says upto 7 days then start drying. I consulted one doctor and she has written few test. I want to know if is any bacterial disease or harmonal or antibody issue. Will these test be beneficial? Just for second advice l.