Common Cold

The common cold is a viral infection of your nose and throat (upper respiratory tract). Many types of viruses can cause a common cold.

Symptoms of a common cold usually appear one to three days after exposure to a cold-causing virus. Signs and symptoms, which can vary from person to person, might include:

  • Runny or stuffy nose
  • Sore throat
  • Cough
  • Congestion
  • Slight body aches or a mild headache
  • Sneezing
  • Low-grade fever
  • Generally feeling unwell

The discharge from your nose may start out clear and become thicker and yellow or green as a common cold runs its course. This doesn't usually mean you have a bacterial infection.

When to see a doctor

For adults —seek medical attention if you have:

  • Symptoms that worsen or fail to improve
  • Fever greater than 101.3 F (38.5 C) lasting more than three days
  • Fever returning after a fever-free period
  • Shortness of breath
  • Wheezing
  • Severe sore throat, headache or sinus pain

For children —seek medical attention right away if your child has any of the following:

  • Fever of 100.4 F (38 C) in newborns up to 12 weeks
  • Rising fever or fever lasting more than two days in a child of any age
  • Severe symptoms, such as headache, throat pain or cough
  • Difficulty breathing or wheezing
  • Ear pain
  • Extreme fussiness
  • Unusual drowsiness
  • Lack of appetite

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