Pigmentation on the face can be mostly seen on the forehead, cheeks, or nose. It can range from mild spots to severe patches, often caused by multiple factors. "There can be blotchiness ...

One downside to wearing spectacles is the potential for pigmentation and dark marks on your nose, which can deepen over time. Tight eyewear can also cause marks on the nose and under the eyes.

Identifying the marsupials by nose pigmentation patterns also allows the public to assist in conservation efforts. Anyone who spots a koala in the wild can snap a photo and help provide data on ...