As an internal medicine specialist, I have observed a significant surge in patients across Bangalore struggling with a "never-ending" dry cough. While many assume it is a standard cold, the reality is more complex. The primary culprit is the city's extreme diurnal temperature variation. In February, we experience a 15°C swing between chilly 6:00 AM mornings and scorching 2:00 PM afternoons. This "thermal shock" stresses the immune system and parches the protective mucosal lining of the respiratory tract, allowing viruses like H3N2 and RSV to settle in much more easily than usual.

Interestingly, this seasonal transition does not just target the lungs; it also wreaks havoc on the digestive system. We are seeing a high frequency of viral gastritis, or "stomach flu," occurring alongside respiratory symptoms. When the body is forced to rapidly regulate its internal temperature against external fluctuations, metabolic stress occurs. This can lead to sudden bloating, nausea, and indigestion. The dry heat of the afternoon often leads to subtle dehydration, which further slows down gut motility and weakens the body's overall ability to fight off these viral invaders.

Environmental factors in Bangalore act as a major "multiplier" for these symptoms. These pollutants act as microscopic vehicles, carrying viruses deeper into the lung tissues and causing chronic inflammation. This is precisely why a simple viral infection, which should typically resolve in three days, is now manifesting as a persistent, hacking cough that lingers for three weeks or more, long after the initial fever has subsided.

It is recommended to stay hydrated with 1.5–2 liters of lukewarm water and consume freshly cooked, hot meals. Individuals should avoid self-medicating viral coughs with antibiotics. Wearing a mask in dusty areas is suggested to block particles, and medical consultation is advised for high fever lasting over three days or difficulty breathing.