A nail mother is a mole that grows on the nail mother, which is the tissue at the root of the nail that produces the nail, and the nail half-moon is part of the nail mother. If there are melanocytes in the nail mother and skin, and the melanocytes produce abnormal proliferation for various reasons, the nail mother will appear as a black spot. As the nail mother is the structure that produces the nail, if the nail mother produces black spots, there will be longitudinal black lines, or brown bands, on the nail, and as the nevus gradually increases in size, the bands will also gradually widen. In short, a nail mother nevus is a pigmented nevus that grows in a special area. In short, a nail nevus is a pigmented nevus that grows in a specific area. However, if it widens rapidly in a short period of time, the colour of the band is uneven, the border is unclear, the nail plate appears to be damaged and the skin around the nail is involved, it is alerted to nail melanoma and needs to be examined and treated.
A freckle-like nevus, on the other hand, is a dark brown spot on the skin or mucous membranes, often no more than 5 mm in diameter, with clear borders and a smooth surface, and is disseminated, solitary or multiple, with no fusion between the spots. So there is a big difference in the nature of the two diseases.