The information provided here is not a replacement for a doctor. You shouldn't use it for the purpose of self-diagnosing or self-medicating but rather so you can have a more informed discussion with a professional TCM practitioner.
In Chinese Medicine pneumonitis can be treated by one herbs that we have on record. Here is the list below.
Monk fruit might help with pneumonitis
Why might Monk Fruit (Luo Han Guo) help with pneumonitis?
Because it is a herb specifically indicated to treat pneumonitis as can be seen on Monk Fruit's page.
Monk Fruits is a Cool herb that tastes Sweet. It targets the Large intestine and the Lung.
Its main actions are: Lubricates and cools the Lungs. Treats Lung Yin Deficiency. Dissipates nodules and swollen glands. Lubricates the Intestines and relieves constipation.