I remember talking to a parent recently and their kid didn't sleep for a long time. It turned out to be some undiagnosed something-or-other (allergy?). Can't

I remember talking to a parent recently and their kid didn't sleep for a long time. It turned out to be some undiagnosed something-or-other (allergy?). Can't recall the specifics but sleeping issues cleared up for the kid - and parents - when it was treated. sorry can't remember the specifics, I'm sure i will recall the moment the edit link disappears on this post... :)