They can be about 60 to 70 percent successful, said Dr. James Norlund, a dermatologist who specializes in skin color disorders at Group Health Associates in Cincinnati, Ohio.

• 外用以及口服药和紫外线治疗可用来恢复皮肤的色素。副作用是头发生长异常，皮肤颜色过浅或过深。