Thigh root black and clothing tight compression of blood vessels leading to obstruction of blood circulation, or with clothing long-term friction, can be improved by improving lifestyle habits, adjusting diet, medication, fruit acid peeling and other methods to improve the common measures are as follows: 1, improve lifestyle habits: daily do not wear too tight pants, so as not to long-term friction leads to melanin deposition, so that the thigh root black, should control weight, appropriate exercise. Usually you can use exfoliating cleaning products, choose niacinamide-rich body lotion; 2, adjust the diet: eat less and more meals, reasonable weight control, eat more food rich in vitamin C, such as strawberries, oranges, pumpkin, kiwi, tomatoes, grapefruit, green vegetables, etc., with antioxidant, promote vitamin absorption, remove the role of melanin; 3, medication: if the pigment is heavy, you can use topical hydroquinone cream Topical application, or oral vitamin E, vitamin C for treatment, can effectively remove melanin; 4, fruit acid peeling: the method is to use a high concentration of fruit acid for skin keratin peeling, prompting the aging keratin layer off, accelerate the renewal rate of new keratinocytes, epidermal cells, promote the proliferation of elastic fibers, so that the skin pigmentation recede, the skin becomes white.