What causes pus in the nose?

Nasal pus may be caused by factors such as dry air, damage to nasal mucosa, rhinitis, sinusitis, or vestibulitis. It is recommended to seek medical attention promptly, identify the underlying cause, and receive symptomatic treatment under a doctor's guidance. Specific analyses are as follows:

1. Dry Air: Prolonged exposure to dry environments may lead to excessive dryness inside the nasal cavity, causing the nasal mucosa to become dehydrated and cracked, which can result in infection and pus formation. This may also be accompanied by symptoms such as nasal congestion and nosebleeds. It is advisable to increase indoor humidity—using a humidifier, for example—and use saline solution to keep the nasal passages moist, avoiding prolonged exposure of the nasal cavity to dry conditions.

2. Nasal Mucosal Damage: Improper behaviors such as excessive nose picking or forceful nose blowing may damage the nasal mucosa, allowing bacteria to invade and trigger infection. Patients may experience nasal pain and bleeding; in severe cases, localized pus formation may occur. It is recommended that patients reduce harmful habits like nose picking and aggressive nose blowing, avoid over-stimulating the nasal mucosa, and use mild nasal cleansers to help relieve discomfort.

3. Rhinitis: This may be related to viral infections, allergen exposure, or other factors. Initially, patients may experience paroxysmal sneezing, which may gradually progress to profuse watery nasal discharge and nasal itching. In severe cases, pus formation may occur. It is recommended to take medications such as Xiangju Capsules, Biyuan Tongqiao Granules, or Qianbo Rhinitis Tablets as prescribed by a physician.

4. Sinusitis: Factors such as upper respiratory tract infections or structural abnormalities in the nasal cavity may obstruct sinus drainage, promoting bacterial growth and leading to inflammation. Patients may also experience persistent nasal congestion and large amounts of purulent nasal discharge. It is recommended to take antibiotics such as Penicillin V Potassium Tablets, Amoxicillin Tablets, or Cefixime Granules as directed by a doctor.

5. Nasal Vestibulitis: This inflammatory condition may result from irritation due to nasal secretions or bad habits like nose picking, which damage the skin of the nasal vestibule and allow bacterial invasion. Symptoms may include redness, swelling, and pain in the nasal vestibule, along with itching and pus discharge. It is recommended to use medications such as zinc oxide ointment, erythromycin ointment, or Biyanling Tablets as prescribed.

In daily life, patients should maintain proper self-care, engage in moderate physical activities such as running or walking to enhance immunity and promote recovery, and consume foods rich in vitamins A, C, and E—such as oranges, apples, and carrots—which are beneficial for health.