Cryolipolysis for arm slimming makes use of the different sensitivity of subcutaneous tissues to low temperature to selectively make fat cells in the tissues inactive under specific low-temperature conditions, and then make the inactive fat cells metabolize slowly. The tolerance of fat cells to low temperature is lower than that of skin, 5℃ is enough to make fat cells necrotic without much harm to skin, but if the temperature is too low, skin damage may occur. Therefore, the surgical risk of cryolipolysis for arm slimming is mostly caused by unskilled operation of doctors and poor temperature control, including temporary redness, bruising, soreness and numbness of the treated area after the surgery, which usually disappears naturally in 1-3 weeks. If you rub your hands at this time, it will often aggravate the skin damage and bruising due to the reduced elasticity of the skin after freezing. Excessive freezing of deep tissues or skin cryoinjury leads to tissue adhesion, deep unevenness, depression, local nerve damage, pain pulling, and hyperpigmentation. In addition, people with contraindications to surgery, such as those with open wounds, dermatitis, hernia, impaired peripheral circulation in the six months after cesarean section, as well as those with skin laxity and pathologic obesity, are not suitable for this surgery. Therefore, it is recommended that candidates choose a professional medical institution and do a good job of communicating with the doctor before the surgery, clearly informing the medical history, which is conducive to avoiding adverse reactions.