Astelin is prescription nasal spray and sometimes helps. Sinus rinse helps also, sometimes nothing helps and I lay down with head back and it drains down throat. Sometimes it takes hours for relief and sometimes eating crunchy foods helps, hot soup or tea helps. Steam over face helps. Just avoid the things that triggers it! Sometimes that is impossible to do though.
For me things that triggers it is night lights while driving, stress, crying, cold air, elevators that go up high, airplane pressure of going up high, and most of all smells, anything other than food. Candles, soap, aerosol sprays, perfume, smoke from grills or fireplace, deodarant, car or bus fumes, lotions, etc. Even sea food bothers my when in grocery store. The best thing I can tell you is stay away from those things and see if it helps. There is no cure only medicine to help and it doesn't always work!