A runny nose, also known as rhinorrhea, is a common symptom that can be caused by various factors, including allergies, viral infections, and irritants.
Common causes of a watery runny nose include:
- Allergies: When your immune system reacts to allergens like pollen, dust mites, or pet dander, it can cause your nasal passages to become inflamed and produce clear, watery mucus.
- Viral infections: Colds, flu, and other viral infections can cause a watery runny nose as your body fights off the virus.
- Irritants: Exposure to smoke, fumes, strong odors, or cold air can irritate the nasal passages, leading to a runny nose.
- Spicy foods: Eating spicy foods can stimulate your nasal passages and cause a watery runny nose.
- Vasomotor rhinitis: This condition, sometimes referred to as "nonallergic rhinitis," is characterized by a clear, watery nasal discharge caused by dysregulation of the nerves that supply the nasal cavity.
Other possible causes of a runny nose include:
- Sinusitis: An infection of the sinuses can lead to a runny nose, often with thick mucus.
- Nasal polyps: These growths in the nasal passages can cause a runny nose, as well as congestion.
- Medications: Some medications, such as decongestants, can cause a runny nose as a side effect.
If your runny nose is persistent, bothersome, or accompanied by other symptoms such as fever, headache, or facial pain, it's important to consult a doctor to determine the underlying cause and receive appropriate treatment.
