(HealthDayNews) -- Croup, an infection that causes the trachea and larynx to swell, usually occurs in children between ages one and three. The condition often occurs during a cold.

Symptoms, which are often worse at night, include fever, hoarseness and a barking cough. Most kids with mild croup can be treated at home, according to the American Academy of Family Physicians.

Here's what to do:

• Make sure your child gets plenty of rest.
• Increase the amount of liquids your child drinks.
• Avoid using cough medicines.
• Acetaminophen may help relieve a fever and chest discomfort.

Call your doctor if:

• Your child's lips and skin are bluish or turn dark.
• His breathing becomes more difficult.
• He's cranky or constantly uncomfortable.
• He starts drooling or has trouble swallowing.