Possible causes of low growling in four-month-old babies include congenital laryngeal cartilage dysplasia, laryngitis, asthma and so on.
1. Congenital laryngeal cartilage dysplasia: If the baby’s laryngeal cartilage is not yet well developed, the airway is relatively narrow, and when there is an airflow through it, a low growl may be emitted.
2. Laryngitis: four-month-old babies have weak body resistance, if the larynx is infected with bacteria leading to laryngitis, there is inflammation and edema in the laryngeal area, when there is airflow through, there will also be a low growl, hoarse symptoms.
3. asthma: if the baby for the allergic body, when contact with allergic substances, induced airway spasm, will also hear the baby appeared low roar sound, at this time auscultation lungs may appear rumbling.
Four-month-old baby issued a low roar, there may also be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.