For melanosis on the inner thigh roots, before considering the method of removal, it is necessary to first clarify what causes it. It may be caused by prolonged friction between the legs of obese people and can be removed by weight loss. If tinea cruris also occurs in this location, the pigmentation caused by this disease usually disappears after the original disease is cured, and no special treatment is usually necessary. If you are still unable to get rid of it by the above means, you can consider using medication or even laser treatment: a. Treatment for the cause: 1. Weight loss: Melanosis of the inner thigh roots is common in obese people, and it appears to become darker due to the mutual friction of the thigh roots when walking. For this phenomenon, the first thing you need to do is to lose weight, and it is recommended that a combination of moderate exercise and diet control can not only make weight loss and reduce the friction at the root of the thighs, but also promote blood circulation and accelerate the metabolism of melanin, which helps to remove melanin from the inner thighs; 2. Treatment of the original disease: Tinea corporis is an infectious skin disease that occurs in the groin, perineum and perianal area. When the disease develops on the inner thighs, red patches with flaking are often seen on the affected area, which may have a burning or itching sensation, and melanin deposits may appear after the papules subside. Generally, local application of antifungal drugs such as fluconazole, voriconazole, etc. for treatment, after the disease is cured, melanosis will also subside. Second, symptomatic treatment: 1, drug treatment: you can try to apply hydroquinone cream, hydrogen peroxide solution, etc. in the local melanosis for treatment. But hydroquinone cream is a strong reducing agent, due to photosensitivity, so suitable for night use; 2, laser treatment: If the inner thigh root melanosis is more stubborn, through the above-mentioned methods in a long time is still not effective to get rid of, can consider going to the regular hospital for laser removal.