Hi I can understand your concern...
Your mother having interstitial lung disease ILD ....
But you have not mentioned cause. ...
So following has to be ruled out .....
-
Interstitial pneumonia -asbestosis or silicosis like
occupational lung disease -
hypersensitivity pneumonitis by dust, pollen etc..
-
Idiopathic pulmonary fibrosis -some immune disease like
rheumatoid arthritis , scleroderna, sarcoidosis etc...
For correct diagnosis along with x ray , lung tissue biopsy needed.....
According to cause treatment guided....
Your mother might need steroid to reduce inflammation...
If pneumonia cause then antibiotic given...
Measure your blood oxygen level , if low oxygen therapy given to protect heart ..
So you can consult good pulmonologist for your condition nearby hospital in state ...
Take care ....
Hope your concern solved..