Beauty moles, tear moles, lucky moles …… Do you have these representative moles? In Chinese folklore, moles are very elaborate, and different parts and sizes of moles have different meanings. These sayings mainly come from traditional phrenology and are closely related to the thousands of years of Chinese civilization history, but there is no scientific basis for these sayings. What we usually call moles are pigmented moles, i.e. colored moles, which are the most common benign skin tumors in humans and are skin manifestations caused by the increase of melanocytes in the epidermis and dermis. In fact, every person has at least 15~20 moles all over the body, only that each mole has different size, shape, color, location and so on. What exactly are the benefits of moles to the human body? Scientists in UK did a study on 1800 twin brothers and sisters, and found that the one with more moles aged relatively slowly (less likely to get old age disease), while the other one with fewer moles aged relatively fast. However, it does not mean that the more moles on a person’s body, the better. There are some moles that we must pay great attention to. Some moles that we think are ordinary moles may actually have a high risk of cancer, or even malignant moles. So how can we determine whether a mole on our body is benign, or malignant? To judge correctly, we should observe from the following aspects, including the location, size, color, amount, shape and growth rate of the mole. I. Location: Moles on the palms of hands, feet, nail beds, mucous membrane areas, vulva, mouth and lips should be paid attention to, because moles in these areas can easily become malignant melanoma. Moles in these areas should avoid friction and reduce stimulation, and it is best to treat them early to prevent malignant transformation. Second, size: moles less than 1 cm in diameter are generally irrelevant; those with a diameter of 1-2 cm can be operated selectively; if the diameter exceeds 2 cm, then surgery must be done as soon as possible! Because the bigger the mole is, the higher the chance of cancer. III. Shape: If the boundary of a mole is originally symmetrical and regular (usually round), but suddenly becomes irregular, unclear and asymmetrical in shape, then it may be a sign of cancer, which should be closely observed and treated in time. 4. Color: The color of moles is usually black, called melanoma. If you find that the color of the mole changes, with different shades of color, or part of it becomes a different color, or even becomes the same as normal skin color, it is not necessarily a good thing, because it may also be a manifestation of cancer. V. Metastatic changes: Melanoma moles generally grow slowly and horizontally. If a large mole suddenly grows many small moles next to it, this is what we call “satellite phenomenon”, which means the mole is gradually metastasizing. This is also one of the signs of mole cancer. Local skin lesion: If a mole with intact epidermis suddenly becomes bulging, easy to bleed, easy to break down and difficult to heal, it is basically sure that it is a malignant melanoma.