Zygomycosis, also called mucormycosis, is a rare infection caused by a group of fungi called Mucoromycotina. These fungi are typically present in the soil and decaying organic matter such as leaves, compost piles, or rotten wood. Infection is more common among people who have weakened immune systems. People become infected by inhaling fungal spores, which can cause an infection to develop in the lungs, sinuses, eyes, and face. The fungus can also enter the skin through cuts, scrapes, or abrasions. Zygomycosis is not contagious and cannot be spread from person to person. Symptoms of Zygomycosis depend on where in the body the fungus is growing, but most commonly affects the sinuses or lungs. These symptoms can include fever, headache, and sinus pain. Lung infections from the fungus can cause fever and cough. When infected through the skin, symptoms can look like blisters or ulcers, and the infected tissue can turn black. Other symptoms include fever and tenderness, pain, heat, excessive redness, and swelling. If the infection is left untreated or not treated quickly, the fungus can spread to the rest of the body, and the infection is often fatal.