1. Facial spots and moles can be distinguished from their appearance and color. The spots are lumpy, yellowish or light brown. Moles are dot-shaped black spots that protrude from the surface of the skin.

2. Moles can occur on the skin and mucous membranes of any part of the body, either congenitally or acquired. Its shape is a flat or slightly raised maculopapular rash, which can also be hemispheric, papillomatous or pedunculated. The surface is smooth, with or without hair, and the number can be single, several to dozens.

Due to the different types and contents of pigments in nevus cells, nevus can be brown, brown, blue-black, black or dark brown. Most non-pigmented nevus are skin color.

3. Spots are generally formed due to different physical constitutions or the human body is exposed to some induced factors (such as ultraviolet rays, endocrine disorders, etc.). The essence is that the melanin gene of the human body is mutated or damaged, causing melanin to be deposited on the skin. basal layer.

The spots have different shapes and sizes, and there are many types. In contrast, moles are deeper and protrude from the skin, while spots are lighter and lighter.

Extended information:

Several common facial spots

1. Freckles

Freckles are clear and dot-like, granular and not Adhesions. They can be as small as a needle tip and as large as a grain of rice, and are light brown or dark brown in color. They often appear on the forehead, bridge of the nose, cheeks, etc. It will change with the seasons, and physical factors will affect it more deeply (staying up late, abnormal endocrine work and rest, high stress, etc.)

Dominant, starting to form between the ages of six and 12, and peaking around the age of 18 Expect. It is recessive and mostly appears on the face after pregnancy. As long as it is freckles, it is caused by genetic genes and can be passed down from generation to generation.

Every freckle is caused by genetic disease and exists in a solid form in the basal layer of the skin. The genetic gene of freckles increases the activity of tyrosinase in the basal layer under ultraviolet irradiation, forming pigments called freckles.

2. Freckle-like nevus

Leck-like nevus appears as a brown spot-like skin lesion that is very similar to freckles. It is characterized by scattered light brown or dark brown spots, which are similar to the skin epidermis. Flat or slightly raised. It can occur at the skin-mucosal junction anywhere on the body. Skin lesions commonly occur on the face, neck, shoulders and back of hands. The color is darker than freckles and can occur anywhere, regardless of sun exposure. Usually on one side, it usually appears densely and mostly distributed in a localized flaky shape.

3. Chloasma

Chloasma is a collection of free pigments at the bottom of the skin. Flaky appearance is a common facial pigmentation disease. Depending on the location, they are divided into liver spots, butterfly spots, sexual spots, and upper lip spots. It is characterized by diffuse pigment with unclear edges and colors ranging from light yellow to dark yellow to brown.

4. Dermal spots

Dermal spots are pigmentation in the dermis or residues of pigmentation and lead and mercury toxins. The subcutaneous fibrous tissue is necrotic and the pigment in the dermis is accumulated. Also known as brown-green nevus. The form is granular, flake-like, and mist-like. The color is yellowish brown, greenish brown, dark brown, or purple brown. Distributed in bilateral zygomatic, temporal, forehead, nose and infraorbital areas. Symmetrical on both sides, about 8-20, lighter in winter and heavier in summer, and worse when exposed to the sun or lack of sleep.

Reference materials:

Baidu Encyclopedia - Moles

Baidu Encyclopedia - Pigments