Why Nasal Infections Spike During The Monsoon Season?

Last Updated:July 24, 2025, 13:06 IST

One of the primary culprits behind nasal infections during the monsoon is the sudden surge in humidity

The monsoon season brings much-needed relief from the summer heat, but it also ushers in a host of health concerns—particularly nasal infections. Among the most common complaints during this time are sinusitis, allergic rhinitis, and frequent colds. The underlying reasons for this seasonal spike lie in environmental changes, fluctuating temperatures, and weakened immunity.

Dr Darshil Vaishnav, Consultant Laryngologist and ENT Surgeon, Bhailal Amin General Hospital shares all you need to know:

One of the primary culprits behind nasal infections during the monsoon is the sudden surge in humidity. Excess moisture in the air creates the perfect breeding ground for bacteria, viruses, and fungi. When inhaled, these microorganisms irritate the nasal passages, leading to inflammation and infection. The sinuses, air-filled spaces within the bones of the face are especially vulnerable. During the monsoon, inflammation or blockage caused by allergens or infections can hamper proper sinus drainage. This stagnation becomes fertile ground for infection, resulting in sinusitis—characterized by headaches, facial pain, nasal congestion, and a feeling of heaviness in the head.

Another major trigger for nasal issues in this season is the proliferation of environmental allergens such as mold spores and dust mites. Damp corners, leaky ceilings, and poorly ventilated spaces encourage mold growth, which releases spores into the air. When inhaled by sensitive individuals, these spores can trigger allergic rhinitis. Symptoms include frequent sneezing, a runny nose, nasal congestion, and itchy eyes. Prolonged allergic reactions can also weaken the nasal mucosa, making it easier for infections to take hold.

Sudden shifts in temperature—such as moving from an air-conditioned room to the warm, muggy outdoors or vice versa—can stress the body’s immune system. These rapid transitions affect the nasal mucosa, reducing its ability to filter and fend off invading pathogens. The mucous membranes inside the nose become irritated and more susceptible to viral or bacterial colonization.

Environmental factors play a critical role as well. Waterlogging and clogged drainage systems are widespread during the monsoon, particularly in urban areas. These stagnant water bodies become reservoirs for pollutants and airborne pathogens. Breathing in air contaminated by these microbes increases the risk of respiratory and nasal infections. Even indoors, damp walls, poorly maintained air conditioners, and indoor air pollution contribute to poor air quality, further irritating the nasal passages.

Moreover, monsoon-related lifestyle changes can impact immunity. Alterations in diet, reduced physical activity, limited exposure to sunlight (and therefore decreased vitamin D synthesis), and recurring infections can all weaken the body’s defense mechanisms. A compromised immune system struggles to fend off common infections, resulting in more frequent and prolonged episodes of illness.

To prevent nasal infections during the monsoon, it’s essential to maintain good indoor hygiene, avoid allergens, keep living spaces dry and well-ventilated, and support the immune system with a balanced diet, adequate hydration, and sufficient rest. Taking precautions and being mindful of environmental triggers can go a long way in staying healthy during this damp and delicate season.

Swati Chaturvedi

Swati Chaturvedi, a seasoned media and journalism aficionado with over 10 years of expertise, is not just a storyteller; she’s a weaver of wit and wisdom in the digital landscape. As a key figure in News18 Engl…Read More

Swati Chaturvedi, a seasoned media and journalism aficionado with over 10 years of expertise, is not just a storyteller; she’s a weaver of wit and wisdom in the digital landscape. As a key figure in News18 Engl… Read More

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