Though it may seem counter-intuitive, breathing exercises are a powerful practice that can alleviate sinus discomfort. You may wish to blow your nose or use a neti pot before you try these exercises.
Lie on your back with your knees bent and your hands on your belly. Breathe deeply into the belly, focusing on expanding the belly, then draw the breath and energy up through your ribs, chest and shoulders. Exhale the same way, deflating your belly, chest and shoulders, and squeezing all the air out of your belly. Find your own rhythm. Practice for 3-5 minutes.
Benefits: Deep belly breathing activates the parasympathetic nervous system, promoting relaxation and reducing inflammation in the sinus passages. It helps to loosen mucus and improve breathing.