What causes constant runny nose?

Under normal circumstances, persistent runny nose may be caused by poor living habits, nasal foreign bodies, upper respiratory tract infections, allergic rhinitis, sinusitis, and other factors. When this occurs, it is recommended to promptly visit the otorhinolaryngology department of a hospital for evaluation by a physician to establish an accurate diagnosis and receive appropriate treatment. Specific causes are analyzed as follows:

1. Poor living habits: Unhealthy habits such as dry air, excessive nasal cleaning, or smoking can irritate the nasal mucosa and increase the risk of a runny nose. It is important to avoid frequently picking the nose in daily life, and consider gently rinsing the nasal cavity when appropriate.

2. Nasal foreign bodies: If small objects such as soybeans or mung beans are accidentally inserted into the nasal cavity during play, repeated irritation of the nasal mucosa by the foreign body may lead to persistent nasal discharge. One may try leaning forward and using tweezers to remove the object. However, if self-removal is difficult, prompt medical attention is necessary.

3. Upper respiratory tract infection: This is usually caused by viral or bacterial infections. During an upper respiratory infection, inflammation irritates the nasal mucosa, leading to excessive secretions and runny nose. Patients may also experience symptoms such as cough, fever, and fatigue. Under medical guidance, patients can use medications such as acetaminophen tablets, compound paracetamol amantadine capsules, or phenylephrine-dextromethorphan antihistamine tablets to relieve discomfort.

4. Allergic rhinitis: This condition occurs when individuals have an allergic reaction to certain allergens such as dust mites or pollen, resulting in nasal mucosal congestion, swelling, and the secretion of inflammatory substances. Symptoms of allergic rhinitis include nasal itching, paroxysmal sneezing, and clear, watery nasal discharge. In such cases, timely nasal irrigation is recommended, along with anti-allergy medications such as cetirizine hydrochloride tablets, loratadine tablets, or ebastine tablets as prescribed by a doctor.

5. Sinusitis: Sinusitis refers to inflammation within the sinuses and is a common cause of nasal discharge. It may be triggered by bacterial infection, structural abnormalities in the nasal cavity, allergies, or other factors. Symptoms may include nasal congestion, thick purulent nasal discharge, and headaches. Under a doctor's guidance, patients can use medications such as Biyuan Tongqiao Granules, cefixime capsules, or Tongqiao Biyan tablets for treatment.

In addition, persistent runny nose may also be associated with conditions such as nasal polyps or cerebrospinal fluid leakage. Daily care should be emphasized, including maintaining personal hygiene and staying warm, to prevent recurrence of symptoms.