My 3 yr old daughter has a boil on her buttcheek. It opened early this morning and started seeping slightly, which I ve wiped away with a dettol swab and covered. But now the swelling doesn t seem to be getting better and there is still pus inside which looks like its kind of flattened around the exit point rather than being just a head . We have ichthammol ointment, and I m wondering if it is still safe to use this when the boil is already opened? The infection has not caused any fever yet, and she is still in good spirits.