Always smelling a strange odor from the nose that others cannot detect

Constantly smelling a strange odor that others cannot detect may indicate an olfactory disorder. Possible causes include halitosis, atrophic rhinitis, sinusitis, nasal stones, or malignant granuloma. Treatment generally depends on the specific condition and may involve medication or surgery.

1. Halitosis

Long-term consumption of spicy foods, smoking, or slow gastrointestinal motility leading to indigestion can promote excessive bacterial growth. These bacteria break down organic components in saliva and food residues, producing large amounts of volatile sulfur compounds that cause bad breath. Since breathing through the mouth and nose cannot occur simultaneously, unpleasant odors may be perceived when breathing through the nose. It is recommended to develop healthy lifestyle and dietary habits, and use medicated mouthwash under medical guidance to suppress oral bacterial growth, improve the oral environment, and relieve symptoms.

2. Atrophic Rhinitis

Poor living habits or adverse environmental conditions may trigger atrophic rhinitis, leading to fibrous secretions in the nasal cavity and the perception of abnormal odors. Under medical supervision, medications such as vitamin A and vitamin B2 may be used to help prevent nasal infections, maintain mucosal moisture, and improve symptoms.

3. Sinusitis

Inflammation of the nasal sinuses—often due to respiratory infections or allergic reactions—can lead to sinusitis. Inflammatory stimulation may cause nasal congestion, runny nose, and foul-smelling discharge, resulting in the sensation of a strange odor. Glucocorticoid medications such as triamcinolone acetonide nasal spray or fluticasone furoate nasal spray may be used as directed by a physician to control inflammation and alleviate discomfort.

4. Nasal Stones (Rhinoliths)

Nasal stones accumulating in the nasal cavity can obstruct airflow and drainage, promoting bacterial growth and causing foul odors. Treatment typically involves endoscopic removal of the nasal stone. Additionally, anti-inflammatory medications such as cefaclor granules, cefixime tablets, or cefetamet pivoxil hydrochloride tablets may be prescribed to support recovery.

5. Malignant Granuloma

Malignant granuloma can cause abnormal tissue growth within the nasal cavity. Secretions from this growth irritate the nasal mucosa, leading to inflammation, bacterial proliferation, and symptoms such as nasal obstruction, discharge, and unpleasant odor. Anti-inflammatory treatment with glucocorticoids—such as methylprednisolone tablets, prednisolone acetate tablets, or hydrocortisone acetate tablets—should be administered under medical guidance. Immunosuppressive agents such as cyclophosphamide tablets, cyclosporine capsules, or azathioprine tablets may also be used to enhance immune response and prevent disease progression.

If you frequently perceive strange odors, especially when accompanied by other symptoms, it is advisable to consult a doctor for a comprehensive evaluation and diagnosis.