Baby sneezing may be cold, sneezing can be a protective reflex action caused by cold stimulation of the nasal mucosa, or cold symptoms caused by cold. 1. Protective reflex: when the baby’s nasal mucosa encounters cold stimulation, some allergic reactions will occur; sneezing is a protective reflex of the body to cope with external stimuli, the purpose is to alleviate or remove the impact of external stimuli on the human body through the action of gas compression and then suddenly discharged. 2. Cold and flu symptoms: when the baby is cold resistance decreases, it is easy to suffer from upper respiratory tract infections, pathogens cause inflammatory reaction of the mucous membrane of the nasopharynx, secretion increases, sneezing, runny nose, nasal congestion, and other cold and flu symptoms will occur. When your baby sneezes repeatedly and you can’t determine the cause, you should consult a pediatrician to make a clear diagnosis and give the right response.