X: Diseases of the respiratory system

J85-J86: Suppurative and necrotic conditions of lower respiratory tract

The group of conditions under the title "Suppurative and necrotic conditions of lower respiratory tract" includes various diseases that lead to the formation of pus (suppuration or purulence) or dead tissue (necrosis) in the lower parts of the respiratory system, like the bronchi (large airways), bronchioles (small airways), or lungs. The main causes for these conditions could be bacterial, viral, or fungal infections, and in rare circumstances, these could also be caused by the inhalation of harmful substances. Common symptoms for these conditions can include persistent cough, fever, chest pain, and breathing difficulties. As the disease progresses, these symptoms might intensify, and the patient may experience fatigue or weight loss due to reduced oxygen exchange in the lungs. Predominantly, these conditions impact the respiratory system, but if left untreated, the infection can spread and affect other bodily systems.