What Causes Dry Blood From Nose And Smell Of Blood?

have had funny odor and naval congestion for several yrs. Past week, feels like mucous in nasal cavity and different smell, kind of like blood. When I went to blow my nose, a lot of blood responded! And that was scary since the smell is bloody. Not a nosebleed, it is very dry in the house but not sure why this occurred and of course, concerned about a tumor