The manifestations of cancer after mole spotting mainly include the following aspects: 1. Some moles themselves may become larger with time, and the possibility of malignant change after mole spotting is usually relatively small, and only under the effect of some continuous stimulation will there be adverse reactions, symptoms or changes, and there is also the possibility of malignant change, for example: there is a change of color and luster blackening, skin wrinkling, recurrence and faster growth in the original mole area For example, if a mole has black color change, skin wrinkling, recurrence and faster growth rate, unclear boundary, uneven pigmentation on the surface, some may be accompanied by bleeding, ulceration, necrosis and other changes, or some small swellings around the tumor, like satellites, it may be malignant or malignant melanoma, such as hand, foot, and genital area, which are often subject to friction, may also be prone to malignant change. 2.If a mole has sudden itching, pain, and small pigmented moles around it, it should be highly treated as malignant. The color is uneven and needs to be given a high degree of attention. Especially when the diameter of pigmented nevus is >0.6cm or more, it should be removed as soon as possible to prevent malignant transformation, and the malignant degree of malignant melanoma is very high, so we must pay close attention to it.