Okay, I'm just wondering if anyone has ever experienced sinus problems. Every now and then when I'm on a flight either in a pressurized cabin or not, I have problems with pressure in my sinuses. It also happened once under canopy skydiving. It feels like my forehead is going to blow up, and there isn't a thing I can do about it, except ground myself the rest of the day. Has anyone ever had this, is it a reason to see a doctor or something that's normal?