The body-building skin can add beauty to the body, especially the facial skin, more can leave a good impression. So, what kind of skin can be called bodybuilding? Can Be judged from the following four aspects: 1 Skin health. Healthy skin must have three conditions: first, normal skin color. The yellow race should be reddish yellow. Second, no skin disease. The skin is not sensitive, not greasy, not dry, no acne, rosacea and other skin diseases. Third, it has vitality. Normal skin color is ruddy, lustrous then rich vitality, if Cyan, sallow, cadaverous then lack vitality. 2. Skin cleansing. The skin surface has no dirt, no spots, no abnormal uneven. 3. Skin Elasticity. Skin elasticity test can be used to judge: lift the skin, and then release, if immediately flat skin elasticity is good. Elastic skin is smooth, soft, does not shrink, not rough. In general, young people have a vigorous metabolism, dermal connective tissue matrix, adequate water content, all kinds of normal fiber function, subcutaneous fat rich, so that the skin appears smooth, smooth and elastic. The skin is less elastic in the elderly or in people with diseases. 4. Moisture in the skin. The skin's moisture content accounts for about a quarter of the body's total weight, making it a "natural reservoir. ". Skin moisture content if reduced, such as age, poor external conditions, can cause skin moisture reduction, will become dry and even wrinkled, such skin is unaesthetic. In short, healthy skin is ruddy and glossy, soft and delicate, firm and elastic, neither coarse nor oily, shiny and wrinkle-free. At the same time, the skin tolerates well, the senility speed is slow.