And home remedies for allergies?!

youve probably already heard this but try using a neti pot, they work great for cleaning out all the gunk and filth that gets trapped in your nose throughout the day. He could also try drinking hot tea with honey and apple cidar vinegar, all of the ingrediants (hot water, honey, and ACV) have been known to open up your sinuses. Also if he hasnt already he should see an ent, I just found out that im allergic to a lot of things, and have a moderately deviated septum, both factors which could be attributing to my frequent sinus problems