Mycotic diseases, often known as fungal infections, are any diseases or conditions caused by fungi. They often cause harm to your nails, hair, skin, and mucous membranes, but they may also infiltrate your lungs or other organs. A fungal infection may affect anybody, even those who are generally healthy. Fungal spores are prevalent in the environment, and people inhale or come into contact with them regularly without getting sick. However, these fungi are more likely to cause sickness in immunocompromised individuals.