HI, and thank you taking my question. I noticed several days ago that I had a yellow puss filled blister on the inside of my right ankle. I live in SC, and remember slapping an ant off that area. I can t rule out if wasn t a fire ant, although there was only one on my porch, which is strange. Anyway, it s been 4 days and the blister has changed much, maybe slightly bigger. It;s about the size of the tip of a large pencil. I was going to pop it and put medicine on it, then I thought I better ask for advise first. Thank you, Marcia