There are two kinds of white spots on the legs: 1, pale white patches, the border is not clear, covered with fine scales, consider seborrheic dermatitis is more likely. If accompanied by some itching, you can take oral levocetirizine hydrochloride capsules once a day, one capsule at a time. Combined compound glycyrrhizin capsules three times a day, two capsules a day, and can be used externally Dinaid ointment twice a day, or tramadol ointment, two times a day for treatment. 2, vitiligo, the main cause is not clear, may be related to neurological disorders, or hereditary factors, immune disorders, etc.. In the clinical treatment, you can apply the tincture of compound Kalizilan or calcium phosphatase inhibitors, such as tacrolimus ointment or pimecrolimus ointment for treatment, and need to take oral glycyrrhizin tablets three times a day, two tablets a time with the treatment.