Patient: I have had small blister looking like sores under the head of the penis right beside the “stringy part”.i did a test and got negative for herpes and syphillis.it was painful at 1st for the 1st 2weeks. but afterwards its quite fine, doesnt hurt and its been there for 2months. not going away but adding 1 or 2more similar blister looking like sore. and my partner kept having re-ocurrin yeast infection. i also found out i had yeast infection , so my ??ion is do you think it could be caused by my yeast infection which i havent cured as yet?