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A lot of fluid runs out of the nose, down the back of the throat or both. It can range from clear fluid to thick mucus.

Drink plenty of fluids. Use a nasal rinse. Stay away from allergy causes. Take an allergy medicine you can get without a prescription if the cause is likely an allergy.

See a healthcare professional right away for:

• Problems breathing.
• A nose that keeps running or has bloody mucus after a head injury.

See a healthcare professional for:

• Symptoms that last longer than 10 days.
• High fever.
• Mucus that's green or yellow with pain or fever.
• Sinus pain.