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If you mean Idiopathic pulmonary fibrosis
, firstly he needs to quit smoking if he is a smoker, avoid pollution. What does he do for a living. Does he work in factory. He needs to have proper investigations for autoimmune disorders
, gastro-oesophageal reflux. Does he have any gastric trouble, any painful joints, constipation
, bone pain
, back pain, urinary trouble. Usually treatment options are not specific in this disease, most Doctors treat with Steroids. Better to get a complete checkup for disorders which can cause this and treat the cause for relief from Pulmonologist.