Sir i have a boil at my back side, in initial time i waited to it to get well itself but it did not until two days and on day three it got an eye,  i mean it was closed but on day three it got open and some pus and a little amount of blood came out of it but it did not get well as normal as it should  be so i applied a belladonna plaster on it, my question is that''there is any problem if i applied a belladonna plaster on an open mouth boil, should i take any step toward this problem or i did it right or wrong i want to know, and i am writing it when it already have passed out about an hour till i applied it on my boil(pus wound with open mouth)...