Therefore, a small amount of swelling can cause a large amount of obstruction in their airways. The peak time for croup to occur is 2 years old. The following are the most common symptoms of croup. However, each child may experience symptoms differently. Very often, the symptoms are worse at night and wake the child from sleep.
Symptoms also seem to improve in the morning and get worse as the day goes on.
The extent of the disease varies for each child. Most children improve in three to seven days. The symptoms of croup may resemble other conditions and medical problems. Blood tests Pulse oximetry - an oximeter is a small machine that measures the amount of oxygen in the blood. When the machine is on, a small red light can be seen in the sensor.