Malassezia is a genus of fungi that naturally resides on the skin of humans and animals. It is part of the normal skin microbiome and typically does not cause harm. However, under certain conditions, such as an imbalance in skin oils or a weakened immune system, it can lead to skin issues like dandruff, seborrheic dermatitis, and other inflammatory skin conditions. This yeast thrives in oily environments and is often found in areas with high sebaceous gland activity, such as the scalp, face, and upper body. Treatments for Malassezia-related conditions often include antifungal shampoos and topical medications to restore balance and reduce symptoms.