The identification method is as follows:

1. Freckles/sunspots

Freckles and sunspots refer to dark brown spots that appear on the face. After exposure to sunlight, X-rays, ultraviolet rays or even fluorescent lamps, a large amount of melanin is produced, forming spotty pigmentation. Some freckles are hereditary, while others are caused by sun exposure, also known as sun spots.

2. Chloasma/Butterfly Spot

Chloasma, also known as liver spots and butterfly spots, is a pigmentation spot that occurs on the face. Chloasma is mainly caused by endocrine disorders in women, high mental stress, various diseases and lack of vitamins in the body, as well as endocrine factors such as ovaries, pituitary gland, thyroid gland, or external chemical stimulation.

3. Coffee spots

Coffee spots are also called coffee milk spots. They are light brown patches that can usually be found at birth. The color of coffee spots ranges from light brown to dark brown. etc., but the color of each piece is the same and very uniform, the shade is not affected by sun exposure, the size ranges from a few millimeters to tens of centimeters, the boundaries are clear, and the surface skin texture is completely normal.

4. Brown-blue nevus

Brown-blue nevus tends to occur on the cheekbones. Because the pigment is deposited in the dermis, it is also called a dermal spot. Brown-green nevus mostly occurs in women aged 16-40, and some patients have a family history. The main pathological characteristics are black and gray spots with a diameter of about 1-5 mm distributed symmetrically on the malar area without any subjective symptoms.

5. Radiation spots

Radiation spots refer to the spots formed by long-term exposure to computers and the computer radiation causing pigmentation on the face. They are also called computer radiation spots. Computer radiation spots are a new skin care term that has emerged recently. Large and small computer radiation spots, dry skin with fine lines, yellowing of skin color, enlarged pores, small acne breakouts, dry eyes, and the formation and worsening of dark circles.