Kernicterus is a rare but serious condition that can occur when high levels of bilirubin build up in a newborn's blood. Some signs of kernicterus include:
Yellowing of the skin and eyes (jaundice) that lasts longer than usual
Stiffness in the baby's body, neck or limbs
High-pitched crying, which may sound like a cat cry
Poor feeding, lethargy or difficulty waking up
Unusually high-pitched or shrill cry, like a cat's meow
Involuntary muscle movements, seizures or involuntary muscle contractions
If you notice any of these symptoms, it is essential to take your baby to a doctor immediately. Early detection and treatment can prevent brain damage caused by kernicterus.