Winter symptoms such as coughing, sneezing, a sore throat and nasal congestion can be caused by air pollution, common respiratory infections or allergies. While these conditions may share similar symptoms, their triggers, duration and associated warning signs can help distinguish between them.

How To Tell If Pollution Is Causing Your Symptoms

Exposure to polluted air, particularly fine particulate matter (PM2.5), can irritate the respiratory tract and worsen existing conditions such as asthma. Symptoms may include a persistent cough, throat irritation, burning eyes, breathlessness and chest discomfort. They may worsen outdoors, near traffic or on days with poor air quality.

Unlike infections, pollution-related symptoms are not contagious. However, prolonged exposure can aggravate respiratory problems and should not be ignored.

Signs Of A Respiratory Infection

Respiratory infections caused by viruses, including the common cold, influenza and COVID-19, may produce coughing, a runny or blocked nose, sore throat, fatigue and body aches. Fever, chills and general weakness are more suggestive of an infection, although not everyone develops these symptoms.

A cold usually develops gradually, while influenza can begin suddenly with fever, muscle aches and marked fatigue. Symptoms alone cannot reliably distinguish between different infections, and testing may be necessary.

Could It Be An Allergy?

Allergies can also cause sneezing, nasal congestion, a runny nose and itchy or watery eyes. Repeated sneezing and itching, particularly without fever or body aches, may point towards an allergy.

Symptoms often appear after exposure to triggers such as dust, mould, pollen or pet dander. Unlike a respiratory infection, an allergy is not contagious.

When Should You See A Doctor?

Persistent symptoms, worsening cough or repeated episodes of breathlessness warrant medical evaluation. Seek urgent medical attention for severe difficulty breathing, persistent chest pain, bluish lips or confusion.

People with asthma, chronic lung disease, weakened immunity or other underlying health conditions should be particularly cautious. Reducing exposure to polluted air, avoiding smoke, maintaining hand hygiene and staying up to date with recommended vaccinations can help lower respiratory risks.

The Bottom Line

The timing of symptoms, exposure to pollution or allergens, and the presence of fever, body aches or itchy eyes can offer clues about the cause. However, symptoms often overlap, so a medical assessment may be needed for an accurate diagnosis.

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