What causes yellow fluid to drain from the nose?

Under normal circumstances, yellow nasal discharge may be caused by factors such as upper respiratory tract infection, allergic rhinitis, atrophic rhinitis, sinusitis, or nasal polyps. It is recommended that patients seek medical attention promptly and receive treatment based on the specific condition. Detailed analysis is as follows:

1. Upper Respiratory Tract Infection

This is usually caused by bacterial or viral infections, often leading to nasal mucosal congestion and increased secretions. When the nasal mucosa is infected by viruses or bacteria, yellow nasal discharge is produced, which is typically a natural response of the body to eliminate pathogens. Patients may take medications such as acetaminophen tablets, ibuprofen tablets, or compound licorice tablets under medical guidance. Additionally, it is important to drink plenty of water during treatment.

2. Allergic Rhinitis

Allergic rhinitis is a condition characterized by nasal mucosal congestion and inflammation triggered by allergens. When allergens come into contact with the nasal mucosa, the immune system releases chemical substances that cause mucosal congestion, swelling, and yellowish watery discharge. Patients are advised to avoid allergens promptly and use medications such as loratadine tablets, cetirizine hydrochloride tablets, or ebastine tablets as directed by a physician to alleviate symptoms.

3. Atrophic Rhinitis

Atrophic rhinitis is a chronic inflammatory condition of the nasal cavity, usually resulting from long-term dryness, atrophy, and scarring of the nasal mucosa. In this condition, nasal discharge may appear yellow and be accompanied by symptoms such as nasal obstruction and foul odor. Patients may use mometasone furoate nasal spray, fluticasone propionate nasal spray, or oxymetazoline hydrochloride spray under medical supervision to improve symptoms.

4. Sinusitis

Sinusitis refers to infection and inflammation of the sinuses. When the sinuses become infected, yellow nasal discharge is commonly produced, possibly accompanied by symptoms such as headache, facial pressure, yellow runny nose, and fever. Under a doctor’s guidance, patients may use medications such as Biyan Tongqiao Granules, cefixime capsules, or Tongqiao Biyan Pills for treatment.

5. Nasal Polyps

Nasal polyps are soft tissue growths protruding within the nasal cavity that may irritate and rub against the nasal mucosa, causing the aforementioned symptoms. Nasal polyps are often associated with symptoms like nasal blockage and reduced sense of smell. Patients should seek timely treatment at a reputable hospital, where surgical removal of nasal polyps may be recommended.

These are some common causes of yellow nasal discharge. If additional severe symptoms occur—such as persistent high fever, severe headache, or facial swelling—it is advisable to seek immediate medical care for accurate diagnosis and proper treatment.