Pityriaseidae is a family of fungi that primarily includes species known for causing skin conditions in humans and animals. These fungi are typically found in warm, humid environments and can thrive on the skin's surface, where they feed on dead skin cells. One of the most well-known members of this family is Malassezia, which is associated with conditions like dandruff and seborrheic dermatitis. While these fungi are part of the normal skin flora, an overgrowth can lead to irritation and inflammation, necessitating treatment to restore balance.