How to Control Black Spot Fungus Disease on Roses. The signs of black spot fungus on roses are hard to miss. Black spot (blackspot) is one of the most common diseases of rose bushes; and, if left unchecked, it can cause quite a bit of damage to your rose garden. Caused by the fungus Diplocarpon rosae, black spot begins just as its name suggests, with black spots showing up on the surface of the leaves.
1 Swallowing disorders (may result in actual post-nasal drip or just cause the sensation of having it) 2  Strep throat (post-nasal drip is an uncommon strep throat symptom, but it can occur)  Pregnancy and other conditions that cause fluctuation of hormone levels.
Interestingly enough, one common cause of bloody mucus in nose areas is high blood pressure. While the blood vessels and the nose seem hardly related in any pertinent way, Kaiser Permanente points out that high blood pressure can cause nosebleeds, which can result in bloody mucus discharge. What can cause this is the perfect storm of adjacent occurrences.