Phlegm (pronounced FLEM) is the secretions found in the throat including saliva, nasal secretions and sometimes acid secretions from the stomach. Phlegm becomes problematic if it interrupts voice production, breathing or swallowing. Too much phlegm may cause a “wet” or “gurgly” voice, or even difficulty swallowing. Increased amount of phlegm may cause one to clear his or her throat out often and repeatedly. Phlegm may also be a reason that individuals wake up at night. Phlegm normally thin in nature; however when it becomes thick it becomes difficult to tolerate. When there is not enough phlegm present that may become problematic as well.

Phlegm is mostly saliva, which is made by the salivary glands. There are four major salivary glands – two parotid glands located in front of the ears, and two submandibular glands located below the mandible or jaw bone. These four glands produce the majority of saliva. Sublingual glands, located below the tongue and minor salivary glands located throughout the mouth, throat and even the nose provide small contributions to the amount of saliva.

There are disorders where patients may complain of decreased secretions such as Sjogren’s syndrome. This is an autoimmune process in which individuals have dry eyes and dry mouth. Medications may also cause patients to complain of dry mouth as well. Finally, radiation used to treat head and neck cancer may cause salivary glands to produce less saliva that is often thick in quality.

Nasal secretions also contribute to phlegm. These secretions originate from the mucosa, or internal lining of the nose. For patients with allergic symptoms increased nasal secretions may drain into the throat, causing “too much phlegm”.

Acid reflux from the stomach also may contribute to phlegm. Acidic contents from the stomach may reflux, or travel backwards into the esophagus and throat. Acid from the stomach may be very irritating to individuals, causing problems of difficulty swallowing, cough, and even burning sensations in the throat.

Control of phlegm can be challenging because, as listed above, there are many contributions. Stepwise approaches considering these causes of phlegm may be necessary.

Dr-Verma - Voice and Swallowing Doctor - Sunil Verma MD is an online resource for patients and physicians to learn more about common voice, swallowing, breathing and throat disorders. Throat complaints, from cough to cancer, are a common reason for patients to seek medical treatment. This website developed as a result of Dr. Sunil Verma's passions: that of education, patient care, and interest in technology.

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NOTE : The information presented on this site is for educational purposes only, and is not intended to replace consultation with a qualified physician. It may not be appropriate to your individual case, and should not be used in making treatment decisions, especially with regard to medication. Considerable effort is made to ensure that the information on this site is accurate, but medicine is a changing field, and this website is not responsible for errors or omissions. Use of this website acknowledges the above.

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