As the summer heat intensifies, respiratory illnesses are increasingly being reported across Kerala. In recent times, there has been a noticeable rise in patients presenting with a lingering cough (post-viral cough) and breathlessness that persist for weeks after a common viral fever subsides. The cough that drains away our energy in a punishing summer can be quite tough to handle if not given the right medical care. Dr Prajusha Mohan, Consultant Pulmonologist at Mandiram Hospital, Puthuppally, explains the reasons it persists, the symptoms, and the preventive measures.
Why does the cough persist
In many cases, airway inflammation following a viral infection can take time to heal. When combined with airborne dust and high humidity levels, the natural defence mechanisms of the lungs are further weakened, which makes recovery slower.
Alarmingly, symptoms resembling asthma are now being observed even in non-smokers and in individuals with no prior family history of allergies. Changing lifestyles, along with rising levels of atmospheric pollution, are believed to be key factors behind this.

Using antibiotics without a doctor’s prescription can only complicate the condition. Photo: iStock/AaronAmat
Key symptoms to watch for
Cough that lasts more than two weeks: Do not self-medicate by assuming it is merely an allergy.
Changes in breathing sounds: Any abnormal breathing sounds, especially a whistling sound (wheezing), should be taken seriously.
Breathlessness: Experiencing unusual breathlessness while walking or performing even light activities indicates reduced lung function.
Night-time cough: A cough that disturbs sleep could be an early sign of asthma or other allergic respiratory conditions.
Diagnosis and evaluation
Simple tests such as the Pulmonary Function Test (PFT) are now available to assess lung capacity. This test helps determine how efficiently the lungs are functioning. If symptoms are identified, do not dismiss them as mere allergies. Seek the help of a pulmonologist without delay.

Simple tests such as the Pulmonary Function Test (PFT) are now available to assess lung capacity. Photo: iStock
Preventive measures
Wear a mask: Using N95 masks in areas with heavy dust and smoke can help protect the lungs.
Stay hydrated: Drinking plenty of water during summer helps maintain moisture in the airways and facilitates the expulsion of mucus.
Avoid self-medication: Using antibiotics without a doctor’s prescription can only complicate the condition. A healthy pair of lungs is the foundation of a long life. Even minor symptoms, if identified and treated in time, can prevent serious complications.