When should I start pumping my baby’s nose with nasal aspirator when she has colds?

You don't need to pump your baby's nose; it's more of a sucking action. I usually use it when I notice a booger in her nose as she is unable to blow her nose yet. I have both the bulb nasal aspirator and tube one. The tube should be gentler on the baby's nose, but the bulb one is more convenient. It is able to extract out mucus effectively.