The Black fungus affects various parts of the sinus- maxillary, ethmoid, sphenoid, and frontal- lungs, brain and some other organs such as liver. This is a very dangerous fungus that sits inside the sinuses once a patient inhales them. In a patient with diabetes and immuno-compromising issues, it can grow very rapidly in these areas. It eats away the flesh, tissues and bones near the eyes and nose of the patient. It can also cause lung pneumonia.