New Delhi: As Delhi-NCR enters a seasonal transition phase, familiar sounds of sneezing in offices and metros, often dismissed as a minor nuisance, are emerging as a serious public health concern.
Doctors across the region are reporting a rise in cases of allergic rhinitis, but with a troubling twist. Beyond the usual symptoms, patients are increasingly experiencing what specialists describe as “allergy brain fog”.
ENT experts say this condition goes far beyond nasal discomfort. Persistent inflammation caused by allergies is now being linked to “cognitive congestion”, a cluster of issues including poor concentration, daytime fatigue and disrupted sleep cycles. In many cases, chronic nasal blockage is contributing to sleep apnea-like symptoms, affecting work performance and daily functioning.
Specialists point to a surge in both the number and severity of cases this season. Dr Meena Agrawal, senior consultant ENT surgeon at PSRI Hospital, says, “Patients now report prolonged nasal blockage, post-nasal drip, and recurrent sinusitis. These symptoms are more persistent and aggressive,” she says.
According to her, the primary driver is a “double exposure” effect — the interaction between seasonal pollen and high levels of particulate pollution.
This combination, doctors say, is making allergies more intense than in previous years. “Pollutants can alter pollen structure, making it more allergenic and easier to penetrate the respiratory tract,” Dr Agrawal adds, highlighting why many patients are experiencing longer episodes and reduced response to standard treatments.
Beyond physical symptoms, the cognitive impact is becoming increasingly evident.
“Brain fog is not just a vague complaint, it reflects real physiological changes,” says Agrawal. Chronic inflammation releases cytokines that can affect brain function, while nasal blockage disrupts oxygen flow and sleep quality, she adds.
Dr Rajesh Bhardwaj, senior ENT specialist at MedFirst Clinic, echoes this concern, emphasising the compounding effect of Delhi’s environment.
“Our patients are facing a double whammy. Pollution weakens the nasal mucosa, making it more vulnerable to pollen. This creates a cascading effect where symptoms worsen significantly,” he says. This leads to night-time breathing difficulties, increased snoring, and even sleep apnea.
“Disturbed sleep patterns directly affect cognitive function, leading to irritability, daytime fatigue and reduced efficiency at work,” Bhardwaj said. This phenomenon, often referred to as “presenteeism”, is increasingly visible among young professionals who are physically present but mentally less effective.
Doctors also warn that untreated allergic rhinitis can lead to more serious complications. Dr Karuna, consultant ENT and head and neck Surgeon at Aastha Hospital, highlights the risk of progression. “Chronic inflammation can block sinus openings, leading to sinusitis. In severe cases, patients may develop nasal polyps, which can cause significant breathing difficulty and even obstructive sleep apnea,” she says.
While allergic rhinitis cannot be cured, experts stress that it can be effectively managed with timely intervention. Early consultation can prevent long-term complications.
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