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Wet coughs: What to know

A wet cough is a type of cough that brings up fluid, such as phlegm. This is the opposite of a dry cough, which does not produce any fluid.

In some cases, the type of cough a person has can help indicate its cause. This is because some underlying conditions produce mainly wet coughs, while others produce mainly dry coughs.

Read on to learn about some other differences between wet and dry coughs, as well as their potential causes. This article also outlines the various treatment options available for a wet cough.

a woman doing a wet cough into her hand .Share on PinterestA person with a respiratory infection may experience a wet cough.Coughing is a reflex that occurs in response to irritation in the throat or lungs. It is the body's way of removing irritants such as fluid and phlegm.A wet cough occurs when fluid in the airways triggers the coughing reflex. Another name for a wet cough is a productive cough, since it produces phlegm.A wet cough can occur for a variety of reasons. Some potential causes include:respiratory infectionschronic lung conditionsa heart conditionSometimes, a wet cough is accompanied by other symptoms, such as:shortness of breathwheezingbubbling, popping, or rattling sounds, called "crackles"continuous, low-pitched, snore-like sounds, called "rhonchi"pink tinged phlegmThese symptoms can provide a clue as to what is causing the wet cough.Various disease processes affect the lungs in different ways. A wet cough indicates that there is fluid in the airways. With a dry cough, however, there is little to no fluid in the airways. Therefore, a dry cough does not produce phlegm.Some conditions may produce either a wet cough or a dry cough. Other conditions may produce mainly one or mainly the other, but with both potentially present.Causes of a wet coughSome typical causes of a wet cough include:A respiratory infectionA wet cough often occurs as a result of a respiratory infection. Various types of respiratory infection can lead to an increase in mucus, including:Other potential symptoms of a respiratory infection include:BronchiectasisThe bronchial tubes carry air in and out of the lungs. Bronchiectasis is a condition in which the surface tissue of the bronchial tubes becomes thick, floppy, and scarred, with a widening of the tube diameter as a result of chronic inflammation.This results in excess mucus production, which can trigger a wet cough. Excess mucus production, leading to a buildup within the bronchial tubes, also increases the risk of a lung infection.Some other potential symptoms of bronchiectasis include:wheezingbreathlessnessfatiguecoughing up blood or blood stained phlegmchest painjoint painclubbing of the fingertipsChronic obstructive pulmonary diseaseChronic obstructive pulmonary disease (COPD) is an umbrella term for a group of chronic and progressive lung conditions. Some of these include:Some forms of COPD cause damage to the tiny air sacs within the lungs, while others affect the bronchial tubes, the bronchioles, or both.Some symptoms of COPD include:a wet coughwheezingshortness of breathtightness in the chestCongestive heart failureCongestive heart failure (CHF) occurs when the heart has difficulty pumping blood throughout the body. When this ineffective pumping occurs on the left side of the heart, it causes fluid to leak into the air sacs within the lungs. The result is a wet cough, crackles, and wheezing.According to the American Heart Association (AHA), CHF may produce pink tinged mucus. Some additional symptoms may include:shortness of breathfatigueswelling of the legs or feet, due to right sided heart failure causing poor circulationCauses of a dry coughA dry cough differs from a wet cough in that it does not produce any fluid or mucus. It generally develops in response to irritation or inflammation of the airways.Some common causes of a dry cough include:gastroesophageal reflux diseaseasthmapulmonary fibrosiscertain medicationsPeople with a persistent wet cough may seek treatments to suppress it. However, suppressing a wet cough can lead to a buildup of mucus in the air passages of the lungs. This can lead to further complications, such as breathing difficulties and infection.Instead of suppressing it, wet cough treatments typically aim to improve cough efficiency, thereby helping people clear the airways.Other treatments aim to clear phlegm and associated irritation in the back of the throat.If the cough is due to an underlying medical condition, a doctor will prescribe specific treatments for that condition.Treatments to improve cough efficiency and clear phlegmSome of the treatments below help improve cough efficiency. Others decrease mucus in the back of the throat, thereby reducing the need to cough.Expectorants and mucolyticsExpectorants and mucolytics are medications that thin the mucus and make it less sticky. This makes it easier for people to cough it up.These medications work best for people who have a wet cough but are having difficulty getting the phlegm up.Airway clearance devicesAirway clearance devices, such as the oscillating positive expiratory pressure (PEP) device, use pressure and vibration to help shift phlegm from the airways during exhalation. This helps improve cough efficiency.A 2014 review investigated the efficacy of PEP therapy in the treatment of stable bronchiectasis. The review included seven studies involving a total of 146 participants. The researchers found that PEP therapy improved cough effectiveness and sputum expectoration when compared with no treatment.Gargling with salt waterGargling with salt water is an easy home remedy that may help alleviate a wet cough. The salt water may decrease mucus in the back of the throat, thereby reducing the need to cough.A range of different salt water recipes are available. Most, including that of the American Dental Association, recommend mixing half a teaspoon of salt with 8 ounces of warm water. People should consider gargling this a few times per day to reduce phlegm.Specific treatmentsThe treatment options for a wet cough also depend partly on the cause. Some more specific treatments include:AntibioticsAntibiotics are helpful for a wet cough that occurs due to a bacterial infection.One 2017 review found that taking appropriate antibiotics helps improve the resolution of a chronic wet cough among children with bacterial bronchitis.Medications to treat CHFPeople who experience a wet cough due to CHF may receive drugs called diuretics, which help relieve fluid retention. This, in turn, can reduce the amount of fluid in the lungs, which can help alleviate a wet cough.People who have CHF may also receive drugs to:In some cases, a wet cough may signal a serious underlying health condition, such as a lung or heart disease. If a person is in any doubt as to the cause of a wet cough, they should make an appointment to see their doctor.People should see a doctor as soon as possible if they experience any of the following symptoms alongside a cough:foul-smelling phlegmgreen, yellow, or pink tinged phlegmcoughing up bloodswelling in the legs, feet, or anklesa wet cough that lasts more than a few dayssignificant fever or chillsPeople who experience the following symptoms should seek emergency medical attention:bluish skin or nailslabored breathingconfusion or loss of consciousnesschest painA wet cough occurs as a result of excess fluid or mucus in the airways. A range of conditions can cause a wet cough, including respiratory infections, chronic lung conditions, and CHF.Once a doctor has diagnosed the underlying cause of a wet cough, a person can begin appropriate treatment.The treatment will depend partly on the cause of the wet cough. Medications such as mucolytics and expectorants can help remove mucus from the lungs. Antibiotics can help treat bacterial respiratory infections, while specific CHF medications will be necessary to treat the symptoms of heart failure.People should see a doctor if they are in any doubt as to the cause of their wet cough.
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