Symptom: Runny nose

    Runny nose is excess drainage, which may range from a clear fluid to thick mucus, produced by the nasal and adjacent tissues and blood vessels in the nose. The drainage of runny nose may run out of your nose or down the back of your throat or both.

    The terms "rhinorrhea" and "rhinitis" are often used interchangeably to refer to a runny nose. Strictly speaking, rhinorrhea refers to a thin, relatively clear nasal discharge. Rhinitis refers to inflammation of the nasal tissues from a number of causes, which usually results in a runny nose.

    Nasal congestion may or may not accompany runny nose.

    Runny nose

    Less commonly, runny nose can be caused by polyps, a foreign body, a tumor or migraine-like headaches.

    Causes of runny nose include:

    1. Acute sinusitis
    2. Bright lights
    3. Chronic sinusitis
    4. Churg-Strauss syndrome
    5. Cluster headache
    6. Cold temperature
    7. Common cold
    8. Decongestant nasal spray overuse
    9. Deviated septum
    10. Drug addiction
    11. Dry air
    12. Dust mite allergy
    13. Food allergy
    14. Hay fever
    15. Hormonal changes
    16. Influenza (flu)
    17. Latex allergy
    18. Lodged object
    19. Medications
    20. Milk allergy
    21. Mold allergy
    22. Nasal polyps
    23. Nonallergic rhinitis
    24. Occupational asthma
    25. Other infections
    26. Peanut allergy
    27. Perfume
    28. Pet allergy
    29. Pregnancy
    30. Respiratory syncytial virus (RSV)
    31. Shellfish allergy
    32. Soy allergy
    33. Spicy foods
    34. Spinal fluid leak
    35. Tobacco smoke
    36. Wegener's granulomatosis
    37. Wheat allergy

    Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.


    Call your doctor if:

    • Your symptoms last more than 10 days.
    • You have a high fever, particularly if it lasts more than three days.
    • Your nasal discharge is green and is accompanied by sinus pain or fever. This may be a sign of a bacterial infection.
    • You have asthma or emphysema, or you're taking immune-suppressing medications.
    • You have blood in your nasal discharge or a persistent clear discharge after a head injury.

    Call your child's doctor if:

    • Your child is younger than 2 months and is running a fever.
    • Your baby's runny nose or congestion causes trouble nursing or makes breathing difficult.

    Until you see your doctor, try these simple steps to relieve symptoms:

    • Sniffing and swallowing or gently blowing your nose.
    • If the runny nose is a persistent, watery discharge, particularly if accompanied by sneezing and itchy or watery eyes, your symptoms may be allergy-related and an over-the-counter antihistamine may help. Be sure to follow the label instructions exactly.
    • For babies and small children, use a soft rubber suction bulb to gently remove any secretions.

    Try these measures to relieve postnasal drip — when excess mucus accumulates in the back of your throat:

    • Avoid common irritants such as cigarette smoke and sudden temperature changes.
    • Drink plenty of water.
    • Use a humidifier.
    • Try nasal saline sprays or rinses.


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