Bloody Mucus on Flo-Nase

I am allergic to nine enviromental allergens and have been taking fluticasone propionate (flo-nase) for the past three monts and it's been working fine to treat sinus pressure, my only main symptom. However, since i started, i've noticed for the first time in as long as i remember that i've been getting thick nasal mucus either dark red or black, sometimes streaked and sometimes completely colored, while before it's always been thin and clear. It doesn't really bother me, i was just wondering what it is.

[CLS22]

I'm also taking Fluticasone Propionate and have the very same issue.  I think it's because the nasal spray dries out the nasal cavity.  At first, I started having bloody noses, but then that stopped and this current symptom started.  My doctor had said it may make the nose very dry and to try saline solution once daily after the Flonase.  I have yet to do that, but it's supposed to help. Hope that helps.