Hello,
I read your question carefully and can understand your concern for your granddaughter very well.
I would like to tell you that
jaundice is very common in newborn after 2nd day of birth and its physiological and most of the times it will go away within 7 to 10 days without any treatment. Rarely
bilirubin level goes beyond 18 or 20mg/dl.
If the bilirubin level goes beyond 18, then baby requires
phototherapy which consists of UV rays which convert water insoluble bilirubin into soluble form, which can be easily excreted from her body.
Blanket is the other name of home phototherapy, works on same principle and its very common, so i would recommend your daughter to use it to ease the jaundice. It is also effective as long as the baby is healthy. But if the baby is not feeding well or has high grade
fever or
convulsion, then i would suggest you to admit in Neonatal
ICU till the condition improves.
Otherwise no need to worry and use bili blanket to reduce the levels of bilirubin, which mostly become normal within 2 weeks or so.
Hope this will help and feel free to ask any of your further queries directly to me anytime, i will be happy to guide you in right direction.