My acupuncturist said Bi Yan Pian is good for allergies and sinus problems.  I suffer from extreme allergies and am going through acupuncture to get rid of my body's reaction to these allergies.  In the meantime going off antihistamines this tea really works wonders. The Bi Yan Pian disolves mucus from allergy reactions thereby letting your body get rid of the toxins.  Antihistamines dry you making the toxins stay in your body and oh yeah it lowers your immunity so you get sick.  Good reason to go off anithistamines.  This tea tastes very good with the combination; I use honey with ginger and that is amazing.  I will continue using this tea as needed because it works so well if I drink too much I'm actually too dry...but then the acupuncture is part of that too.  Hope this helps you decide.