Ding! Ding!
It can dehydrate you and dry out the sinuses. Many guys report dry mouth waking up at night on DNP. I would lean this way too unless you have checked your BP and it is real high for some reason. Dry sinuses crack and bleed more easily.
I would do 3 things:
1) Obviously make sure you are hydrated.
2) Buy a saline (salt water) nasal spray/rinse and use it when you shower. It will moisten, heal and clean dry cracked nasal passages. It is good for the tissue in general. I do this when I have congestion too.
3) Consider running a humidifier a night. In cold temps w/ indoor heat, the air gets real dried out and humidity is low. I like to keep my bedroom humidity higher when I sleep.