Babys are born with jaundice when they carry excessive bilirubin in their blood. They treat your baby at the hospital after he or she is born. They basically put them under light for a little "tanning session" :)
my son had it he was put under Billi lights at the hospital then his Dr had me open my curtains up strip him to his diaper and lay him in the sun for 30 mins to a hour it cleared up in a week if not less
it wasn't too bad. I had my son in September. so we keep the blinds open and had us cuddle in the sun light. my nephews had it, not too bad but they were born in the winter time-in ut- and the Dr gave them a light to sorta have them "sun bathe" under.