1. If people’s facial skin is exposed to the sun for a long time, especially if it is exposed to direct ultraviolet rays without cover, it can easily cause pigmentation. After using low-quality cosmetics or long-term use of cosmetics that are inconsistent with the properties of their own skin, some people's skin will experience allergic reactions or inflammation, which can also lead to pigmentation and the formation of dark spots.

2. Female endocrine (hormonal) disorders, digestive disorders (such as long-term constipation), decreased liver function, excessive mental stress, severe lack of sleep, anemia and other reasons can all cause it. The production of dark spots.

3. In addition, premature aging of the skin is also one of the important causes of dark spots. The epidermal cells on the face are usually replaced every 25 to 30 days. If the skin metabolism is strong, even pigmentation will disappear naturally in a short period of time with the shedding of the stratum corneum. As we age, the skin's metabolism gradually declines, and the natural repair ability of the skin's stratum corneum decreases. As a result, the deposited pigment becomes difficult to fade and turns into dark spots.

4. Eat more foods rich in vitamin C, such as strawberries, tomatoes, watermelons, citrus, bayberries, red dates and other fruits and green leafy vegetables. Supplement vitamin E in appropriate amounts. Avoid spicy foods such as chili and garlic.

5. Avoid direct sunlight exposure, especially in midsummer. Ultraviolet rays can cause greater damage to facial skin. You must pay attention to protection when going out, and wear sunscreen or sunscreen.

Extended information

1. Dark spots, also known as "pigment spots", mostly occur on the face and are common in women. They are a "disease" that seriously affects people's appearance. Dark spots can be divided into two types: congenital and acquired. A large part of congenital pigment spots are birthmarks. Most of them are large black or blue-black spots on the face or body, called nevus of Ota or nevus of Ito.

2. The other part is the acquired nevus of Ota (brown-green nevus on the zygomatic region) that occurs on the face of Oriental people. Although it is also congenital, it is not present at birth and needs to be diagnosed after adulthood. It will slowly appear in your twenties to forties, and the color will deepen due to internal factors such as pregnancy or hormonal imbalance, or external factors such as sun exposure.

3. Other congenital conditions include café-au-lait spots, freckles and various melanomas. Acquired dark spots include chloasma, freckles, melanosis, etc.

Reference: Baidu Encyclopedia: Black Spot