Saline flush is a very effective treatment for sinus pressure, and it is also a prevalent home remedy. To treat yourself using saline flush, you make use of the saline spray.  Saline sprays help reduce sinus pressure since it is made up of saltwater that increases moisture in the nasal passage.
You can either make your saline spray with just three essential ingredients: baking soda, iodine-free salt, and distilled water, or you could buy it. Either way, it is necessary to get a prescription on applying it because saline sprays are different, and excess use of some could be harmful.