TODAY

The skin around the eyes is some of the thinnest on the body, which can sometimes allow a glimpse at the dark blood vessels around them. Usually, dark circles, or periorbital hyperpigmentation, start to appear more over time. They can occur for a variety of reasons, including genetics and the normal aging process.

“After the age of 30, we lose that fat that once protected that concavity around the eye,” one dermatologist told TODAY. "When you have that hollow, then you have shadows that are evident.”

But if the dark circles appear rapidly or are accompanied by other symptoms, then they can be a sign of something else. See the conditions that can cause dark circles, home remedies that can help and when it might be time to see a doctor below.

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Intermittent fasting has exploded in popularity in the last couple years mainly because of the weight loss benefits people who have tried one of the plans have seen. However, research is also showing that intermittent fasting can benefit your body in other ways, too.

By controlling the timing of when you eat and giving your body a chance to reset, your blood sugar and blood pressure can also be more regulated, which can lead to overall better heart health. Once your body becomes accustomed to intermittent fasting, it can also help curb your hunger signals. See the TODAY anchors discuss more about the health benefits doctors found and the different types of intermittent fasting below.

Even when we know people’s names, why do we go for days without using them? By using someone’s name, you help them feel seen and acknowledged — and that’s an act of kindness. According to kindness.org’s research in collaboration with the University of Oxford, doing a kind act increases happiness, well-being, trust and compassion. And it can have the same powerful effect on those who receive the act. Try it, and put a smile on both your faces.