In addition to aesthetic factors, the following types of moles should be removed in order to avoid becoming malignant melanoma: 1. Moles that grow in special places: For example, moles that grow on the extremities (hands and feet) must be observed carefully because moles in these places have a higher chance of becoming malignant melanoma than those in other places. 2. Mucous membrane moles: moles in the oral mucosa, conjunctiva, vagina, and the part of the foreskin that is turned out. 3.Moles in the nail groove: The nail groove is connected to the skin below the nail and may grow under the nail, which is blocked by the nail and cannot easily see the change. 4.Moles that will be stimulated by long-term friction: such as moles that grow at the place where bras are worn and at the waist. 5.Moles with atypical changes: Moles with atypical appearance may become malignant, such as very dark moles with uneven pigmentation (miscellaneous), uneven or irregular edges, unknown boundaries, asymmetrical left and right, and statistically larger than 5 mm in diameter. 6.Sudden and rapid change of a single mole: If it is a whole body mole that changes at the same time because of hormonal changes, it is less suspicious, but if it is a single mole that changes suddenly and rapidly, it is worth noting. 7. Some moles are congenital high-risk moles: Moles that can be seen as soon as babies are born are called congenital moles, and there are not many congenital moles. Generally speaking, the larger the mole, the greater the chance of it becoming malignant in the future, so physicians suggest that it should be removed early. Some people have crab foot swelling (also known as scarring), and the scar tissue will grow abnormally, resulting in hypertrophic scars. Crabfoot swelling is usually found on the earlobes, shoulders, upper arms, forehead and back, but not on the face. If you want to remove moles for cosmetic purposes, you should inform your physician about your body type first, so as to avoid big scars from moles. Commonly used methods of mole removal: The way of mole removal usually depends on the type, size and location of the mole, generally speaking, if it is more than 3mm, it has to be removed. 1. Excision: As long as malignant moles are suspected, they should be excised and sectioned for examination. Compound nevi and dermal nevi are too deep and protruding, so if you want to get rid of them, you should use excision. Larger moles should be sutured after excision, and even skin implants and flap transfer and expander treatment should be done. 2.Laser: Laser is a treatment method that uses electrical energy to convert into light and is suitable for smaller and shallower moles, such as flat joint moles. 3.High-frequency electrocautery: It destroys cells with heat energy. 4.Liquid nitrogen freezing: low temperature destruction at -196 degrees Celsius, but rarely used. 5.Drug to remove moles: There are two kinds, one is to use biotechnology to remove moles with herbs, which is effective, fast and not easy to leave scars; the other is chemical corrosion to remove moles, the disadvantage is that it is not good to control the depth and scope of cauterization, and there will be concave holes when the points are bad, and some holes are very deep; so you need to identify carefully when choosing drugs.