J00-J06: Acute upper respiratory infections

J05: Acute obstructive laryngitis [croup] and epiglottitis

Acute obstructive laryngitis, also commonly known as croup, and epiglottitis belong to a group of conditions that affect your throat. Both conditions occur when the larynx (voice box), and in the case of epiglottitis, also the epiglottis (a flap of tissue at the base of the tongue) get inflamed. This inflammation can cause an obstruction or blockage, making it difficult to breathe. Causes include viral or bacterial infections, with common symptoms being a fever and a distinctive cough that can sound like a seal's bark. With time, the disease may progress to affect your quality of life, leading to rapid breathing, and in severe cases, blue lips due to lack of oxygen. While anyone can contract these conditions, they tend to be more common in children. Transmission typically occurs when an infected individual coughs or sneezes, spreading the virus or bacteria through the air.