What are the common causes of freckles? What stimulates the formation of freckles?

Although freckles have a relatively high incidence rate in life, and this phenomenon is getting younger and younger, many female friends in life do not particularly understand the causes of freckles, so everyone cannot properly prevent them in life. So what are the common causes of freckles?

What are the common causes of freckles?

Freckles usually appear as skin lesions around the age of 3 to 5 years old, and are more common in women. Their number gradually increases with age. It is common on the face, especially the nose and cheeks, and can affect exposed parts such as the neck, shoulders, and back of the hands. There is no rash on non-exposed parts. The lesions are light brown or dark brown pinhead-sized to mung bean-sized macules that are round, oval or irregular. Distributed in scattered or clustered forms, isolated and unintegrated. No subjective symptoms. The rash becomes darker and more numerous after sun exposure in the summer, while it becomes lighter or disappears in the winter. There is often a family history.

What stimulates the formation of freckles?

1. Genetic factors: The freckles gene produces melanin under exposure to the sun, forming freckles. Some parents do not have freckles, but their children develop them later. This shows that many people who carry the freckle gene do not show it in their adolescence, but show it later under exposure to the sun. Some pregnant women did not have freckles before, but hormonal changes during pregnancy stimulate the formation of freckles. These women are recessive carriers of the freckle gene.

2. Long-term exposure to the sun. The sun's ultraviolet rays make the skin's melanocytes active. The damage of ultraviolet rays to the skin causes the skin's metabolism to be weakened, resulting in the inability to excrete melanin normally. Over the years, a large amount of melanin accumulates to form freckles.

The above article introduces the causes of freckles. I hope that everyone can understand these common causes, which can be more helpful in treatment. At the same time, it also recommends that female friends must pay attention to protecting their skin in daily life and reduce direct sunlight, and choose appropriate cosmetics according to their skin and pay more attention to rest.