After starting phototherapy, your baby's condition should improve quickly. You may notice little change, especially if there were few signs of jaundice other than the yellowish color. However, you may also notice improvements such as your baby being less lethargic, eating more frequently, or needing more diaper changes. These are all positive signs.

​

The yellowish hue typically doesn't disappear immediately. It may lessen over time. It's okay if your baby still appears yellowish. It may take a few weeks for your baby's color to return to normal.

​

Still concerned? Talk to your doctor or nurse. Call the doctor or nurse immediately if:

• Your baby appears lethargic or sleepy and it doesn't improve.

• Your baby isn't feeding well.

• Temperature of 100.4°F (38°C) or higher.

• Temperature of 96.8°F (36°C) or lower.