Here are typical reasons for a cough:
* Infection — Cold and flu (influenza) viruses are the most common causes of cough. Coughs from colds typically develop when excessive amounts of mucus irritate your airways.
* Asthma — Various forms of asthma and asthma-like conditions affect up to one in 10 people. Coughing is a common symptom during the night, after exercise or when exposed to irritants.
* Post-nasal drip — An overproduction of mucus can occur with some allergies and sinusitis (inflamed mucous membranes within sinuses). The slow trickling of mucus from the back of your nose down into your throat causes irritation.
* Environment — Irritants include smog, dust, home aerosol sprays, cigarette smoke and cold or dry air. Cigarette smoke irritates the airways of both smokers and nonsmokers. If you smoke, nicotine paralyzes the movement of tiny hairlike projections lining your airways called cilia. When cilia can't help clear excess mucus, the sticky secretions build up and cause coughing.
* Medications — Coughing can be a side effect of inhaled medications, such as corticosteroids. Coughing can also occur with use of some beta blockers and angiotensin-converting enzyme (ACE) inhibitors prescribed for high blood pressure or heart disease.
* Unexplained cough — Sometimes there's no medical explanation for a cough. Some people have a persistent cough after an infection resolves. Others may cough to release tension, gain attention or express anger. Whatever the reason, continual coughing can irritate your throat and set up an exhausting cycle.
* Infection — Cold and flu (influenza) viruses are the most common causes of cough. Coughs from colds typically develop when excessive amounts of mucus irritate your airways.
* Asthma — Various forms of asthma and asthma-like conditions affect up to one in 10 people. Coughing is a common symptom during the night, after exercise or when exposed to irritants.
* Post-nasal drip — An overproduction of mucus can occur with some allergies and sinusitis (inflamed mucous membranes within sinuses). The slow trickling of mucus from the back of your nose down into your throat causes irritation.
* Environment — Irritants include smog, dust, home aerosol sprays, cigarette smoke and cold or dry air. Cigarette smoke irritates the airways of both smokers and nonsmokers. If you smoke, nicotine paralyzes the movement of tiny hairlike projections lining your airways called cilia. When cilia can't help clear excess mucus, the sticky secretions build up and cause coughing.
* Medications — Coughing can be a side effect of inhaled medications, such as corticosteroids. Coughing can also occur with use of some beta blockers and angiotensin-converting enzyme (ACE) inhibitors prescribed for high blood pressure or heart disease.
* Unexplained cough — Sometimes there's no medical explanation for a cough. Some people have a persistent cough after an infection resolves. Others may cough to release tension, gain attention or express anger. Whatever the reason, continual coughing can irritate your throat and set up an exhausting cycle.
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