The Harvard Medical School has shared which type of cough should raise concerns.

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A cough is a natural reflex that clears the airways, but when it lasts longer than three weeks, it’s worth paying attention to. Doctor Jessica McKinnon from Harvard explains that a typical cough caused by a cold or respiratory virus generally resolves on its own. However, if it persists for more than eight weeks, it is considered chronic and requires further evaluation - writes The Harvard Medical School.

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The causes of chronic cough can vary. Doctors often begin their investigation from the upper respiratory tract and then move down to the lungs and stomach. Possible causes include sinusitis, seasonal allergies, acid reflux, side effects of medication, or even harmful habits like smoking or vaping. A chronic cough may also be a symptom of serious conditions such as asthma, COPD, lung infections, or even cancer.

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Sometimes even minor issues like earwax can trigger a cough, McKinnon says. If the cough continues, an over-the-counter medication can be tried—antihistamines for allergies or antacids for reflux. It’s important to keep track of all symptoms and their characteristics, such as when the cough appears, whether it is wet or dry, or if it worsens after eating or at night. This information will help the doctor determine the cause.

McKinnon advises seeing a doctor if the cough is accompanied by shortness of breath, chest pain, wheezing, blood in the sputum, weight loss, or constant fatigue. Healthcare professionals may order an X-ray or CT scan for a more accurate diagnosis if there is suspicion of a serious illness.

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