Please, please give this a try. I know it's expensive, but it seems to really work. Just rub some on anywhere you see signs of the infection showing up. It worked for my hubby, his client, and his client's wife. Just rub it on, a few times a day. It may be too late with that boil if it's big, but if the doc drains it... rub this on while it's healing. http://smile.amazon.com/gp/product/B001O0BL9E?psc=1&redirect=true&ref_=oh_aui_search_detailpage
The brand I have is Manuka Health. It seems pricey, but if you have availability to get it from Costco it was $32 for 17 ounces where I am! Half the cost of amazon!