Hello, I can understand your concern for the vitiligo on lips. After analyzing your query I can get that you have the problem of Lip tip Vitiligo . Vitiligo or white skin disease is a skin problem where the color giving cells are damaged and are not able to manufacture color to the skin. The resulting situation is manifested as slight diminished pigmentation at first. Later on slowly and finally progresses to complete white skin problem. There are multiple types of oral and topical treatments or combination treatment available to take care of the problem. You have been given a good and safe treatment by your doctor. I additionally prescribe a lotion containing beta growth factor and then sun exposure over the affected area. You can take further guidance from a dermatologist. All the best.