Mucormycosis is a type of fungal infection. It’s relatively rare, but also very serious. Formally known as zygomycosis, this infection tends to occur most often if you have weakened immunity from an illness or health condition. It’s important to get treatment. If left untreated, mucormycosis can be fatal. With a skin infection, mucormycosis can develop within any part of your body. It may initially occur at the site of skin trauma, but it can quickly spread to another area.The fungus can also infect your skin via a cut or burn (cutaneous exposure). In such cases, the wound or burn ends up becoming the area of infection.