Vitiligo is called "vitiligo" or "Bai Fengfan" in traditional Chinese medicine. This is a skin disease with depigmentation. The local skin without conscious symptoms began to turn white and gradually expanded. The white spot is light yellow or milky white, with consistent shape and size, clear boundary, smooth surface, no dandruff and no pain.
You can observe whether the surface of the white spot is smooth and dandruff-free, and the white spot is pale white or milky white. If the boundary is blurred or spreads to normal skin, it may be vitiligo, but further diagnosis requires instrument examination.
I wish you a speedy recovery!