[janedoe]

have you taken yourself or your kids to see a doctor? that should be your first stop.
have you moved recently? anything around you guys change recently? sometimes kids get stuff from school, bring it home and then everybody keeps giving it back to each other. kids are pretty good at fending off stuff pretty fast, but if they bring something home to mom, then the whole thing goes round and round. stress also causes a lot of strange things happening to us.
see a doc, or dermatologist. you have a regular doctor for your kids, right? sometimes us adults dont have a way to see the doc for ourselfs, but youve got to have some kind of insurance/medical for your kids.
good luck