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Croup Croup is a contagious viral infection that affects children's respiratory system. Symptoms include a barking cough, stridor, fever and difficulty breathing. Treatment my incorporate the use of a humidifier, saline nasal spray, and pain relievers such as ibuprofen and acetaminophen.
By Mayo Clinic Staff. Print. Croup refers to an infection of the upper airway, which obstructs breathing and causes a characteristic barking cough. The cough and other symptoms of croup are the result of swelling around the vocal cords (larynx), windpipe (trachea) and bronchial tubes (bronchi). When a cough forces air through this narrowed passage, the swollen vocal cords produce a noise similar to a seal barking. Likewise, taking a breath often produces a high-pitched whistling sound (stridor). Croup typically occurs in younger children.