A gastroenterologist

First of all, contact a dermatologist.

There is an opinion that white spots on the body, they talk about some internal disease, eliminating which you can eliminate the spots. Therefore, doctors-dermatologists, before prescribing treatment, direct patients to take a general blood test and without fail to a gastroenterologist and an endocrinologist. If these experts do not reveal any pathologies, then the patients are prescribed complex therapy. It boils down to taking vitamins and drugs that increase the sensitivity of the skin to the effects of sunlight, as well as stimulating melanin (photosensitizing), along with this, copper sulfate, phototherapy, laser therapy, photochemotherapy, and surgical treatment are used.