Hello My father aged 59 years, has had a very good immunity till until now but suddenly has been facing persistent Cough & Cold issues since last 6 months on & off. We have met and ENT specialist but the cold doesn't seem to go away. He complains of breathing issues right when he wakes up in the morning and tries to clear his nose and takes regular steam to feel at ease. I would like to know which doctor to consult next and get rid of this issue which he is facing since long. Thank you in advance!