Department of Public Health & Human Services

Public Health & Safety Division             

What you need to know about runny noses.

Your child has a runny nose.

This is a normal part of what happens during the common cold and as it gets better. Here are some facts about colds and runny noses.

What causes a runny nose during a cold?

When germs that cause colds first infect the nose and sinuses, the nose makes clear mucus. This helps wash the germs from the nose and sinuses. After two or three days, the body's immune cells fight back, changing the mucus to a white or yellow color. As the bacteria that live in the nose grow back, they may also be found in the mucus, which changes the mucus to a greenish color. This is normal and does not mean your child needs antibiotics.

What should I do?

  • The best treatment is to wait and watch your child. Runny nose, cough, and symptoms like fever, headache, and muscle aches may be bothersome, but antibiotics will not make them go away any faster.
  • Some people find that using a cool mist vaporizer or saltwater nose drops makes their child feel better.