Sneezing, a runny nose and a blocked nose are common in both allergy and the common cold, so many people can’t tell which one they have. Getting it right matters, because the causes and treatment are different. In this video, Dr. Dipak Viradia, Chest Physician & Intensivist, explains the key differences.
What causes them? A common cold is a viral infection that spreads from person to person through coughing, sneezing and touch. An allergy is the immune system overreacting to harmless substances such as dust, dust mites, pollen, mould, pet dander or smoke. Allergy is not an infection and does not spread to others.
| Common Cold | Allergy | |
|---|---|---|
| Cause | Virus | Dust, pollen, mould, pet dander, smoke |
| Spreads to others | Yes | No |
| How it starts | Gradually over 1–2 days | Suddenly, soon after exposure to a trigger |
| How long it lasts | Usually 7–10 days | As long as exposure continues; can last weeks or keep coming back |
| Fever, body ache | Sometimes | No |
| Itching in nose, eyes, throat | Rare | Very common |
| Sneezing | Occasional | Frequent, in bouts |
| Nasal discharge | Watery, may become thick | Clear and watery |
| Watery, red eyes | Uncommon | Common |
| Sore throat | Common | Mild throat itching more common |
| Pattern | A few times a year | Seasonal, every morning, or with a specific trigger |
Simple clues. If symptoms come with fever and body ache and settle within about a week, it’s likely a cold. If you have itchy eyes and nose, repeated sneezing, and symptoms that appear every morning, in a particular season, or after dusting or contact with pets, it’s more likely an allergy.
Treatment is different. A cold usually improves on its own with rest, fluids, steam inhalation and medicines for symptom relief. An allergy is controlled by avoiding triggers and using medicines such as antihistamines and nasal sprays prescribed by a doctor. Antibiotics don’t help either condition, unless a bacterial infection develops.
Why allergy shouldn’t be ignored. Long-standing, untreated nasal allergy is closely linked with asthma, sinus infections and disturbed sleep. If your “cold” keeps coming back or never fully goes away, it may be an allergy that needs proper evaluation.
See a doctor if symptoms last more than 10 days, keep returning, come with high fever, facial pain, wheezing, chest tightness or breathlessness, or affect your sleep and daily life.
Dr. Dipak Viradia
Chest Physician & Intensivist | Interventional Pulmonologist & ECMO Specialist
Rudrax Chest Clinic, 301, Solaris Royce, Opp. Old RTO, Athwagate, Ring Road, Surat – 395001
Appointment: +91 75676 19985
Website: www.drdipakviradia.com
A cold often comes with fever and body ache and settles within 7–10 days. An allergy causes itchy eyes and nose, repeated sneezing, no fever, and symptoms that recur with triggers like dust, pollen or pets.
No. A cold is a viral infection that spreads to others, but an allergy is an immune reaction and does not spread.
No. Antibiotics do not work against viruses or allergies. They are needed only if a bacterial infection develops.
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