Face knives are often considered cool in our society and can make someone stand out from the crowd.
Why do some have it and others don't? And then, what are the spots?
To get the scoop, Fox News Digital talked to experts about this particular scientific phenomenon.
Here's what you need to know.
Why do some people get freckles?
Freckles, scientifically known as freckles, are small, pigmented spots on the skin that are more noticeable in fair-skinned people, says Danilo K. Del Campo, MD, FAAD, is a board-certified dermatologist at The Skin Clinic in Chicago, Illinois.
"They are mostly caused by a combination of genetic factors and sun exposure," Del Campo told Fox News Digital.
When your skin is exposed to the sun, it produces more melanin, the pigment responsible for skin color, resulting in freckles.
"It's a natural reaction, but it's also a sign that the skin is sensitive to sunlight," said Del Campo.
"If you or your children notice a sudden increase in the number of spots or notice any changes in the appearance of the spots, it's best to see a board-certified dermatologist," Del Campo said.
"You can find it by searching for the FAAD designation or by going to AAD.org," he said.
What role does genetics play?
The development of spots often has a genetic component, Del Campo said.
"The key gene is the MC1R gene, which affects skin and hair color," he said.
"Variants of this gene can result in lighter skin and hair color, which increases the chance of spots. That's why people with red or blonde hair often have freckles.”
However, genetics can be complicated, and not everyone with these traits will develop the spots, he said.
When do spots appear and why?
Del Campo says that herpes can start to appear in children as early as age 2, and can get worse and more common as they get older, especially after exposure to the sun.
"This happens because the skin reacts to the sun's ultraviolet radiation by stimulating melanocytes to produce more melanin in certain areas, which leads to freckles," he said.
"Although this is a natural process, it serves as a reminder of our skin's sensitivity to the sun."
She recommended regular skin exams with a dermatologist to make sure your skin is healthy.
What role does hair color and skin color play?
Hair color and skin color, like freckles, result from a complex interaction of genetic factors, Chelsea Wagner, MS, CGC, senior genetic counselor at BillionToOne in Kansas City, Missouri, told Fox News Digital.
“The spots are usually more common in fair or light skinned people. However, it is important to note that spots can occur in people of any ethnicity and skin color,” Wagner said.
"This diversity is due to complex genetic factors that determine pigmentation," he said.
"This complexity adds to the amazing diversity we see in what people around the world watch."
Do freckles increase the risk of skin diseases or skin cancer?
According to Wagner, there are many factors, both genetic and non-genetic, that affect a person's risk of developing skin diseases and skin cancer.
“Because of this complexity, it's important to regularly discuss your personal risk factors and family history with your doctor. Regular skin examinations by a doctor are also necessary for early diagnosis and prevention.
Our genes, especially variations in the MC1R gene, set the stage for the spots to develop, while environmental factors, especially sun exposure, act as a catalyst to bring them to life, Wagner says.
"Spots are the unique result of the interaction of genetics and environment, making each individual's pattern of spots truly unique."
Del Campo says the spots themselves are not a direct risk factor for skin disease or cancer.
"However, they show that the skin may be more sensitive to UV radiation," he said.
"Therefore, it is important that people with freckles use sun protection carefully, such as using broad-spectrum sunscreens, wearing hats and protective clothing, and avoiding peak sun hours."
She also noted that regular skin exams by a dermatologist are also necessary, especially for people with fair skin and blemishes, to detect possible skin problems.
"It's important to remember that while spots are mostly harmless, any change in their size, shape, or color should prompt you to see a dermatologist," says Del Campo.
"Early diagnosis and prevention are key to maintaining healthy skin," he said.
“For people with psoriasis, adopting good sun protection habits is not only an aesthetic issue, but also a priority for their overall health. I recommend seeing a board-certified dermatologist for a personal consultation and skin exam.