Human skin has six different colors, namely red, yellow, brown, blue, black and white, such as yellow and white skin, red lips.It is mainly due to the different amount and distribution of melanin in the skin that melanin is a protein derivative, brown or black, produced by melanocytes.Because the amount, size, type and distribution of melanin are different, different skin colors are determined.
Normal skin is usually born and will not change. The skin has six different colors, namely red, yellow, brown, blue, black and white, such as yellow and white skin and red lips.The amount and distribution of melanin in the skin are different. Melanin is a protein derivative, brown or black, produced by melanocytes.Because the amount, size, type and distribution of melanin are different, different skin colors are determined.
Clinical significance
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Abnormal results: skin diseases cause changes in skin color. On the one hand, it can darken the skin. The scope, location, and shape of darkening can be different, forming various spots and spots;On the other hand, it can also reduce skin pigment and form small and light patches.People to be checked: those whose skin color has changed, and those whose skin color has changed due to skin diseases.
matters needing attention
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Unsuitable crowd: people with large tattoos, drug addicts, and people living in radiation environment for a long time.Taboos before examination: no makeup, and after strenuous exercise.Do not eat irritating food or stimulants.Requirements for inspection: The inspection shall be carried out in a room with appropriate temperature as far as possible. The room temperature should preferably be controlled at 20 ℃ - 27 ℃ and natural light should be used as far as possible. During the inspection, attention should be paid to the contrast and comparison of the colors of symmetrical parts of the limbs to find the color difference.
Inspection process
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When conducting skin inspection, carefully observe the upper and lower parts of the body (from head to foot), front and rear parts, including the chest, abdomen, back, buttocks and limbs, as well as the wrinkles under the breast, chin, hair, nail bed, etc., and pay attention to whether these parts are normal and whether there is any change, such as: the area, color and surface of nevus, acne or scar change?Is the ulcer on the skin persistent?Do you feel tingling, numbness and slow reaction?Record all the findings one by one, and then compare whether there is any enlargement, discoloration or other changes in the unusual signs after each inspection.
