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Cough
A cough is a common reflex action that aims to clear the throat of mucus or foreign irritants. Coughing to clear the throat is typically an infrequent action, although there are a number of other conditions that can cause more frequent bouts of coughing. Most coughs will clear up, or at least significantly improve, within two weeks. Any cough that produces blood or hasn't improved after a few weeks may be serious.
Source: healthline.com

www.webmd.com/cold-and-flu/features/stubborn-cough

Jul 2, 2015 ... Are you fed up with your stubborn cough? There are many reasons why a cough may not improve, and that can be frustrating for people and ...

www.health.harvard.edu/staying-healthy/that-nagging-cough

Aug 17, 2017 ... A persistent or chronic cough that lasts longer than a few weeks can be worrisome, but for nonsmokers, the most common causes include ...

www.mayoclinic.org/diseases-conditions/chronic-cough/symptoms-causes/dxc-20201783

Aug 22, 2017 ... Chronic cough — Comprehensive overview covers causes, diagnosis and treatment of this ... Having a persistent cough can be exhausting.

copd.net/symptoms/persistent-cough

A persistent cough is a symptom of COPD. People with COPD have difficulty breathing that is caused by conditions called chronic bronchitis or emphysema.

www.everydayhealth.com/cough/guide

Apr 24, 2017 ... An occasional cough is normal; however, one that persists for several ... Persistent coughing that doesn't subside with treatment usually means ...

patient.info/doctor/chronic-persistent-cough-in-adults

Cough can be divided into acute self-limiting cough, lasting less than three weeks, or chronic persistent cough, which usually lasts for more than eight weeks .

patient.info/blogs/sarah-says/2013/05/persistent-coughs

May 28, 2013 ... Doctors describe a persistent, or 'chronic' cough as one lasting more than eight weeks. Three to eight weeks is 'sub-acute' and less than three ...

www.medicinenet.com/chronic_cough/article.htm

Mar 20, 2011 ... A persistent dry cough is a cough that does not produce any mucus, is irritating to the lungs and throat, and may be a sign of a viral infection or ...

www.rd.com/health/conditions/persistent-cough-causes

Got a chronic cough that just won't go away? One of these medical reasons could explain what's going on with your persistent cough.