Ghostie
The sinus cavities with some people have stickier passages feeding them out of which air has to flow when you climb (not normally a problem unless you have a bad cold) and into which air has to flow when you descend (a much bigger problem as the greater pressure outside can tend to flatten the inlet tissues and make them sort of self sealing).
My solution was to practice (all the time not just when flying) forcing air into my sinuses (and ears as you cannot do one without the other). After a while you get good at it and can feel them pop a little or at least feel flow going in. Get to know how you can normally make this happen and become thoroughly familiar with it. Then before you take off do it again to check for 'normality' by your standards. If you don't feel them inflate you know they are stickier than usual. This means you need to use a decongestant spray - or face trouble when descending.
If you go flying when you cannot work your Eustachion tubes or your sinuses on the ground in a manner that is ‘normal’ for you then it can REALLY hurt. I had Eustachian tubes like drainpipes so my ears were never a problem but my sinuses were dreadful despite everything the RAF ENT people tried.