Guys, I need urgent help

My father,who has had a tough time breathing properly in the past few times because of a slight asthma type of condition. But in these recent times, it has gone out of hand. Both of his nasal blockages get blocked frequently and while sleeping he has to breath from the mouth. Because of this he went to Bombay Hospital in Indore to get a checkup, where after a CT scan the doctor told that both of his nasal passages are blocked because of increased mass which can be removed by an operation. After this he asked some of his friends, who have gone through such kind of an operation, which according to them is not a success. AND MOST IMPORTANTLY, I also seem to have a similar condition. Most of the time, either or both of my nasal passages are blocked. After waking up, i notice that my mouth and tongue get very dry(it gets white) which​ is the same situation as my father is facing. Please suggest what step should we take so as to encounter this problem because in the past few days, it has been very difficult for the both of us