The color of the corner of the mouth is a little light white. What's going on? Can you recover?

The color of the corners of the mouth is light and white. The reason may be vitiligo, white pityriasis, pigment deficiency, etc., need to find a dermatologist to check, in order to determine whether the cause will recover. If vitiligo is caused, it can be relieved by skin grafting surgery, and it is difficult to recover.