I find that if I dive for a long time or severeal days in a row, the cold and pressure causes me to develop a lot of mucous and eventually my sinuses get blocked. The thing to do then is to stop diving and let it clear, or pretty soon you'll be bleeding from the nose.
It helps if you clear the mucous out regularily (like after every dive just remove your mask and blow it out. A bit disgusting, but hey, there are worst things floating in the water).
I've also toyed with the idea of making a "full face" mask for recreational and warmup diving.
I used to have holes in my hood for my ears, but after getting some 3 celcius water in my ear canal a couple of weeks ago, I glued them shut. Any ideas on how to avoid hood squeeze are welcome
