I do something like that for sore throats
But nastier. If I can see the sore areas, then I put a clump of straight salt on it and leave it there. Really smarts, but knocks out the bugs very consistently. Repeat daily if necessary.
Cheers,
Ben
"Career politicians are inherently untrustworthy; if it spends its life buzzing around the outhouse, it\ufffds probably a fly."
- [link|http://www.nationalinterest.org/issues/58/Mead.html|Walter Mead]