Yeast, specifically the type known as Malassezia globosa, can actually lighten skin, rather than darken it. This is because it can interfere with the skin's normal pigmentation process, leading to patches of lighter or darker skin. This condition is called tinea versicolor, and it's a common fungal skin infection.
The discoloration caused by tinea versicolor often appears as light patches on tanned skin, especially in areas like the chest, back, and shoulders. However, in darker skin tones, the patches might appear slightly darker than the surrounding skin.
It's important to note that while yeast can cause skin discoloration, it doesn't directly darken the skin in a way that leads to hyperpigmentation.
