A cough from a typical viral respiratory infection, such as a common cold, usually lasts about two weeks. However, it’s not uncommon for a cough to linger up to a month, even after other symptoms have resolved.

Chelsea Lee is a physician associate at Salem Health Medical Group – Uglow. Lee said a lingering cough is often due to ongoing airway irritation or inflammation rather than an active infection, and it generally improves gradually over time.

When to see a doctor

“A cough should be evaluated if it is accompanied by concerning symptoms such as shortness of breath, chest pain or fever,” said Lee. “These signs may indicate something more serious than a routine cold and warrant medical attention.”

The physician associate said it’s also a good idea to check with your primary care physician if a persistent cough is worsening or interfering with daily activities.

“A helpful rule of thumb is to watch for what providers often call ‘re-sickening,’” said Lee. “This occurs when you initially start to feel better after a cold, but then your symptoms worsen again — especially if a cough is accompanied by a return of fever, chills or increasing fatigue.”

Lee said this pattern can be a sign of a secondary infection or a more serious condition.

High risk groups

There are certain groups that should be more concerned about a lingering cough. This includes those with heart or lung conditions, such as asthma or COPD, as well as people who smoke.

“In children, warning signs include increased work of breathing or unusual lethargy,” said Lee. “For infants, a cough can be more concerning if it interferes with feeding.”

In any of these cases, Lee recommends medical evaluation by a local healthcare provider to ensure there are no complications.

How to stay comfortable

For those simply riding out the discomfort, the physician associate said simple, supportive measures can make a big difference.

“Using a humidifier can add moisture to the air and soothe irritated airways,” said Lee. “Staying well hydrated by increasing fluid intake helps thin mucus and make coughing more productive. Additionally, elevating the head of your bed with additional pillows, for example, may help reduce coughing at night and improve overall comfort.”

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