Is that persistent runny nose a common cold or an allergy?
A runny nose, repeated sneezing and watery eyes can make almost anyone reach for cold medication.
These symptoms are more commonly associated with viral infections.Red, watery eyes, however, deserve attention when they occur alongside nasal itching and repeated sneezing.
If sneezing, congestion or watery eyes interfere with sleep and everyday activities, medical evaluation becomes important.
Antibiotics should not be taken routinely for a common cold because viral infections do not respond to them.
Is that persistent runny nose a common cold or an allergy? Doctors explain five important differences, including sneezing patterns, itchy eyes, nasal discharge, fever and when to seek medical attention.
The biggest difference lies in what triggers the symptoms
Constant sneezing and an itchy nose could indicate an allergy
Pay attention to the kind of nasal discharge
Fever and body aches offer another important clue
When should these symptoms be checked by a doctor?
Medical experts consulted:
Dr D. Dakshina Murthy, ENT and Head and Neck Surgeon, Professor and HOD, GMC, VZM, Visakhapatnam.
Dr Bharesh Dedhia, Consultant, Intensive Care, P.D. Hinduja Hospital and Medical Research Centre, Khar, Mumbai.
A runny nose, repeated sneezing and watery eyes can make almost anyone reach for cold medication. But what if the symptoms are not caused by a cold at all? Sometimes, what appears to be a seasonal infection is actually an allergic reaction. The confusion is understandable because both conditions affect the nose and respiratory tract. However, their causes, duration and accompanying symptoms are quite different. Recognising these differences can prevent unnecessary medication and help people seek the right treatment.A common cold is a viral infection of the upper respiratory tract. More than 200 viruses can cause it, and symptoms generally become worse during the first two to three days before gradually improving."An average common cold lasts between 7-10 days," explained Dr Bharesh Dedhia, Consultant, Intensive Care, P.D. Hinduja Hospital and Medical Research Centre, Khar, Mumbai.An allergy, on the other hand, develops when the immune system reacts excessively to otherwise harmless substances. These include dust mites, pollen, mould and pet dander.Dr D. Dakshina Murthy, ENT and Head and Neck Surgeon, Professor and HOD, GMC, VZM, explained that allergic rhinitis can continue as long as exposure to the triggering allergen persists.Depending on the trigger, symptoms may be seasonal or present throughout the year.Sneezing happens in both conditions, but its pattern can offer useful clues.Allergies often cause repeated bouts of sneezing, particularly after exposure to dust, pollen or pets. An itchy nose, throat or eyes is another important sign."One of the most identifiable symptoms of an allergy is a continuous bout of sneezing," said Dr Dedhia.Colds, meanwhile, are more likely to bring additional symptoms such as a sore throat, cough and fatigue.A watery, clear runny nose that continues for days, especially alongside itching and sneezing, may suggest an allergy.Dr Murthy explained that allergic nasal discharge can persist as long as the person remains exposed to the allergen.A cold can also cause a runny nose, but nasal congestion and mucus consistency may change as the infection progresses. Therefore, nasal discharge alone cannot confirm an allergy.Allergies typically do not cause fever or body aches. These symptoms are more commonly associated with viral infections.Red, watery eyes, however, deserve attention when they occur alongside nasal itching and repeated sneezing. They may indicate allergic conjunctivitis.Another useful clue is timing. Symptoms that repeatedly appear while cleaning, visiting dusty places, spending time around pets or during particular seasons may point towards an environmental allergy.Recurring symptoms should not automatically be dismissed as another cold. If sneezing, congestion or watery eyes interfere with sleep and everyday activities, medical evaluation becomes important."Allergies cannot be diagnosed based on symptoms only since they can easily be confused with viral infection or other conditions," cautioned Dr Dedhia.Dr Murthy advises seeking medical attention for persistent symptoms, particularly when they do not improve within two weeks. Difficulty breathing, dehydration and prolonged fever also require medical attention.Doctors may recommend allergy evaluation or testing depending on the symptoms and their pattern. Antibiotics should not be taken routinely for a common cold because viral infections do not respond to them.
