What causes babies to breathe with a phlegmy sound that sounds like a stuffy nose?

The phlegmatic sound of infant’s breath with nasal congestion can be due to physiological phenomena, respiratory infections or congenital laryngeal stridor, etc., and needs to be analyzed on a case-by-case basis.
1. Physiological phenomenon: for younger babies, the nasal cavity is narrow, the nasal mucosa is tender, and rich in blood vessels, such as indoor environmental temperature is low can appear nasal congestion symptoms, pay attention to warmth nasal congestion can be improved. In the baby sleep for a long time after waking up, there can be phlegm in the throat phenomenon, usually less severe symptoms, this kind of situation is a normal physiological phenomenon.
2. Respiratory tract infections: such as acute upper respiratory tract infection, the baby can appear nasal congestion symptoms, can be accompanied by cough, phlegm, some babies can be accompanied by fever symptoms, such as cough and phlegm symptoms progressive aggravation, need to pay attention to acute bronchitis and other lower respiratory tract infections.
3. Congenital laryngeal asthma: also known as laryngeal cartilage chondromalacia, can appear respiratory phlegm, mainly occurs in the forceful inhalation, part of the wheezing sound, can be accompanied by symptoms of nasal congestion, most of the babies with the growth of the age of the symptom can be relieved, need to pay attention to the period of the physician’s guidance in the reasonable supplementation of vitamin D and calcium supplements.
It is recommended to consult a specialist for evaluation and clarification of the cause.