Bulb baby sucker, also known as a nasal bulb syringe, is used to clear a baby's nasal passages of mucus. Here are some detailed functions of a bulb baby sucker: 1. Relieves Nasal Congestion: The primary function of a bulb baby sucker is to help relieve nasal congestion in babies. The bulb is used to gently suction mucus from the baby's nose, making breathing easier and more comfortable for the baby. 2. Easy to Use: A bulb baby sucker is a simple and user-friendly device. To use it, parents or caregivers just need to squeeze the bulb, place the tip in the baby's nostril, and release the bulb to suction out the mucus.