HI, Is the boil infected, if so, treat with poltice to draw infection out, which could also be the reason for your loss of appetite, my daughter had a boil and i put this on it,(bread,put enough HOT water on to wet, sprinkle suger over bread (just enough to have a light covering),put this directly onto boil and cover, change every couple of hours,do this until no more yuk is coming out, Worked wonders for my daughter.