What should I do if my baby has a runny nose?

Sep 18, 2025 Source: Cainiu Health

Dr. Zhou Xiaofeng

Introduction

In general, infant nasal discharge may be caused by environmental temperature changes, delicate nasal mucosa, acute upper respiratory tract infections, allergic rhinitis, or sinusitis. It is recommended to seek medical attention promptly, identify the underlying cause, and then improve symptoms through general care, medication, or other methods under a doctor's guidance. In daily life, maintain good indoor air circulation by opening windows for ventilation 2–3 times per day, each time for about 30 minutes.

In general, infant runny nose may be caused by environmental temperature changes, delicate nasal mucosa, acute upper respiratory tract infections, allergic rhinitis, or sinusitis. It is recommended to seek medical attention promptly, identify the underlying cause, and then improve symptoms under a doctor's guidance through general care, medication, and other methods. Specific analyses are as follows:

1. Environmental temperature changes: Sudden drops or rises in temperature can stimulate the infant's nasal mucosa, increasing secretion and resulting in clear nasal discharge without other discomfort. Adjust indoor temperature promptly, maintaining it between 22–26°C. When going outdoors, dress the baby appropriately according to the weather to prevent chilling or overheating.

2. Delicate nasal mucosa: An infant’s nasal mucosa has not fully matured and is highly sensitive to external stimuli, which may lead to increased secretions and occasional runny nose. Use saline nasal drops or spray to moisten the nasal cavity—1–2 drops per application. After softening the secretions, gently remove them with a nasal aspirator; avoid forcefully digging the nose.

3. Acute upper respiratory tract infection: Viral infections causing colds result in nasal mucosal congestion and swelling, leading to runny nose and nasal congestion, possibly accompanied by mild coughing. Follow medical advice to use medications such as pediatric paracetamol-phenylpropanolamine granules, pediatric cold-relief syrup, or pediatric antiviral granules to relieve nasal discharge symptoms.

4. Allergic rhinitis: Exposure to allergens like dust mites or pollen triggers an allergic reaction in the nasal mucosa, manifesting as watery nasal discharge and sneezing, typically occurring shortly after contact with the allergen. Avoid known allergens and follow medical advice to use medications such as mometasone furoate nasal spray, loratadine syrup, or cetirizine hydrochloride drops to reduce allergic reactions.

5. Sinusitis: Nasal inflammation spreading to the sinuses causes infection, resulting in yellow, purulent nasal discharge along with nasal congestion and lethargy, often with a prolonged course. Follow medical advice to use antibiotics such as amoxicillin-clavulanate potassium for oral suspension, cefixime granules, or pediatric rhinitis tablets to control the infection.

Maintain good indoor ventilation by opening windows 2–3 times daily for 30 minutes each time. During feeding, prevent choking to avoid milk entering the nasal cavity and worsening discomfort. Through careful care, help alleviate the infant’s runny nose and support healthy respiratory function.

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