Make sure you have a humidifier bottle attached to your oxygen.

Afrin sometimes works for a bloody nose. You put it on a cotton piece,insert at end of nose,leave 20-25 minutes. Remove cotton. Learned this taking care of my mom,from her doctor

Ayr Gel works well for many people.

I've read online that vaseline is not a good choice, I dunno. Of course you can't believe all you read online. I went with the Rhinase nasal spray which helps and they also have a Rhinase ointment if you prefer. I bought a dual pack that has both, but have not tried the ointment yet.

My nose get dry even with the bottle on humidifier. Dont know if i should i put very small amount of Vaseline in my nose.