Dark inner thighs are usually harmless and therefore do not require treatment. However, some people may want to reduce or eliminate dark areas of skin.use rosemary lotion for dark inner thigh and underarms also
REASON FOR INNER THIGH
It occurs when the skin on the inner thigh produces an abundance of melanin, a pigment that gives skin its color. This is called hyperpigmentation. The discoloration of dark inner thighs may even stretch into the bikini or groin area.