Swab peroxide as you have been doing. If you don't have any on hand get some s/steel surgical blades. Great item to have. You can lance a boil or other growth on a pet to allow drainage. We needed to do it to one pup years ago. Then follow correct sanitary procedures for wound clean & maintaining. A growth / tumor at the vet gets lanced and drained. No reason why you cannot do it at home, to save a few $ $ $ $
Hopefully you wil not need on any family members, still nice to have. You might be surprised, once on hand how many times you access them.
http://www.amazon.com/s?ie=UTF8&keyw...cal%20scalpels
Boil Ease is a name of product. Any pharmacy carries drawing salve.
http://www.walgreens.com/store/c/smi...067870-product
http://www.walmart.com/search/search...h_constraint=0