There are actually many causes of wheezing (with phlegm): 1) laryngeal cartilage chondrosis (congenital laryngeal wheezing); 2) gastroesophageal reflux disease; 3) abnormal swallowing function; 4) laryngeal malformation (including many common diseases will be listed later). The laryngeal wheezing caused by various diseases can be grouped into these four categories of diseases. 1, laryngeal cartilage chondromalacia (congenital laryngeal wheezing): most of them are due to this cause, because the laryngeal mucosa is swollen and the cartilage is not supported enough leading to the occurrence of wheezing when breathing, or the cartilage is stretched and other factors, most of these patients do not need intervention, and surgical treatment is considered only when it affects breathing, of course, laryngoscopy is necessary because it is the only way to make a clear diagnosis. 2, gastroesophageal reflux disease: simply put, the stomach is refluxed into the throat, so there will be a wheezing sound, generally speaking, for infants and children is not important, because in the process of development, reflux because the coordination of esophageal muscle development is not yet perfect, a small amount of reflux is also normal, but such patients we generally recommend to go to the gastroenterology department to receive the advice of a specialist, or in the children Please understand that I am not a professional and cannot provide more professional answers. For example, many parents say that the sound of phlegm in my child’s throat is particularly obvious when he eats milk, and that some children have uncoordinated swallowing function. In general, we will take laryngoscopic assessment of swallowing function in patients with significant wheezing with choking. 4, laryngeal malformations: these patients are common in our clinic, such as laryngeal cysts, lingual cysts, epiglottic cysts, and laryngeal clefts. These patients persist with stridor and are likely to have dyspnea, inspiratory depression (inspiration is a concave neck), choking and coughing occurring when eating, etc. This is the type that requires surgical intervention. So my friend is asking how about I have to come to the doctor and need to do tests? I’ll give you a few establishments, you right number! 1, laryngeal tinnitus persists; 2, laryngeal tinnitus with inspiratory depression and choking cough must be seen as early as possible for laryngoscopy; 3, occasional laryngeal tinnitus, aggravated by occasional choking cough when eating, laryngoscopy + swallowing function assessment (except for abnormal swallowing function) is recommended.