Is he also urinating excessively? If you think it is a metabolic problem, get yourself to his pediatrician and have his sugar checked. Don't wait. It's a 2 minute test and if it is something other than the ichthyosis, catching it quickly makes a huge difference. If you know a diabetic, go see them and have it checked that way, since it's a weekend and you may have trouble getting to the ped.
Ichthyosis-en-Confetti Type 2
Husband, Nathan - 10, Elliot - 7, Oliver - 4, all affected.
I also have an unaffected daughter, age 8.
email: jennifer at confettiskin dot com
facebook - find me on "ichthyosis mommy spot" or "friends of ichthyosis"