Millet-like white spots on the skin are not necessarily vitiligo, but may also be simple furuncle or lichen planus. Vitiligo is a pigment loss disease, mainly manifested as milky white or porcelain white patches on the surface of the skin, adjacent white patches can be fused with each other, and the formation of a larger volume of white patches. The skin surface of the millet-like white spots, may be more tiny vitiligo foci, through the acetic acid white test can be clearly diagnosed. Furfura simplex, commonly known as “worm spots”, is a skin disease of unknown origin, which is mainly manifested in the clinic as some round or round-like pigmentation loss spots. Tinea versicolor, also known as sweat patches, is a superficial fungal infection of the skin, in the clinic will be manifested as the appearance of the skin surface of the yellow-brown or yellowish-white spots. The white spots on the skin are like small grains of rice, and it is recommended to go to the hospital, clarify the cause of the disease and follow the doctor’s instructions for treatment.