I have a 4 month old baby. She is sick right now. Coughing, runny and stuffy nose, mucus in her throat and overall exhausted. Before a baby is 6 months doctors can’t prescribe anything. The best thing for sick babies under 6 months are saline spray, a snot sucker and maybe a humidifier. I’m posting to recommend the Nose Frieda snot sucker. It is BOMB! And has been our lifesaver for keeping our baby comfortable and “snot free”. We purchased the kit that comes with the hygiene filters and saline spray which is just sea salt and water which helps loosen the snot before you suck it out. Totally worth the $30. Here is a picture of my beautiful 4 month old getting her nose sucked by daddy. Lol.