Over A Peroid. Of Several Years. I Would Develop. A

Over a peroid. Of several years. I would develop. A blister. And water was in it. It burst and the smelk was horrible. Five years later another. Blister appeared. In my right side under ny bottom. Abd i went to the doctor. To lance. It they were dumbfounded. And gave me no answer yhe smell was awful...this year about three weeks ago. Another blister appeared. On my right hip went to the doctor. She took a sample. Which this. Ine had no odor. But had yellowish fluid. What are these.