My boyfriend has been experiencing problems breathing for more than 5 years.

My boyfriend has a variety of allergies but has gone to his doctor for nasal spray to help open his sinuses. Didnt work. He tried taking Reactin to help relieve this and we have taken precautions in our home to relieve allergies. He can't eat without stopping to breathe through his mouth and sleeps with his mouth open which he cannot stand. He used Otrivin to open up his sinuses- happy to breathe. I'm afraid he's gone so long with the inflammation that it's now pemanent.