This morning my eldest daughter was complaining about her sinuses and seasonal allergies. In exploring the answers to her questions I found two helpful sites.1)

This site has lots of  information and advice.  I thought it’s important to know exactly where the sinuses are and what their purpose is.sinus

Your sinuses — air-filled pockets found within your cheeks, behind your forehead and eyebrows, on either side of the bridge of your nose, and behind your nose — can get clogged easily. Healthy sinuses are lined with a thin layer of mucus that traps dust, germs, and other particles in the air. Ideally, tiny hair-like cilia sweep mucus and anything trapped in it out of the sinuses, down the back of your throat and out through the stomach.

2) This site provides many articles as well as daily information about the allergies and weather in your zip code.

Hope this helps those with aching sinuses.