Which of the following is a common treatment for croup?

The common treatment for croup is the use of fresh cool air. Croup is characterized by a viral infection leading to inflammation of the upper airway, causing symptoms such as a barking cough and difficulty breathing. Fresh cool air can help soothe the airway irritation and decrease airway swelling, making it easier for the child to breathe.

This treatment can involve taking the child outside in a cool environment or using a humidifier indoors to provide moisture and cooler air, which can help alleviate discomfort. The cooling effect of the air can reduce the inflammatory response in the airway, providing symptomatic relief.

Other treatments such as antibiotics are not effective for croup because the condition is typically caused by a viral infection, not a bacterial one. Cold compresses may provide general comfort but do not specifically address the airway inflammation. Bed rest can be supportive but is not a direct treatment for the symptoms associated with croup.