After the baby appears white spots, it is recommended to go to the regular hospital dermatology department for examination as soon as possible. For experienced doctors, they can generally diagnose clearly whether it is vitiligo based on the color of the white spots and the location of the onset and the patient’s family history. But if it can’t be exact, you can take the help of Wooden lamp examination, Wooden lamp generally can better identify whether it is vitiligo. Secondly, you can also take the help of skin CT examination. If these tests are not definite, you can take the help of skin histopathology, which is the gold standard for diagnosing the disease and can generally be better diagnosed. Therefore, if the skin of the child appears white spots, should go to the regular hospital as soon as possible for diagnosis and treatment, and avoid delaying the disease.