5mth old glows yellow when tired or crying

[Lenny]

My dad has Gilberts Syndrome. He goes yellow when he is tired etc. Is basically jaundice for grown ups I think.
I guess seeing as your DFD's daughter is still a baby, then she is having trouble breaking down the bilirubin, just like newborns who are jaundice.
It's more common in breastfed babies I believe.
But good that the dr is doing tests to rule out other liver problems.