Pneumonitis
（重定向自Pulmonitis）
![Pneumonitis.](/Images/godic/202502/05/Pneumonitis4101.png")
Pneumonitis or pulmonitis is an inflammation of lung tissue. Many factors can cause pneumonitis, including breathing in animal dander, aspiration (inhaling small food particles or vomit "down the wrong pipe"), and receiving radiation therapy to the chest.