The precursors of hand frostbite manifest less frequently, and the disease often occurs unconsciously in patients, who become aware of it only after the onset of symptoms. The precursor that some patients may notice is an itchy, red, swollen sensation when the hands enter a warmer environment such as a comforter or warm water. Frostbite of the hands is a cold-induced, confined, bruising, inflammatory skin disease. When in a cold environment, the peripheral circulation of the limbs slows down, especially at the ends of the extremities and exposed areas, and skin damage ensues. The lesions are usually limited edematous purple-red patches or nodules with a tense and shiny surface, clear borders, and receding color when pressed, and the red color gradually returns after pressure is removed. If frozen for a long time, local tissue hypoxia and cell damage is serious, the damage surface can occur blisters, containing yellowish or bloody plasma, blisters broken to form vesicles or ulcers, leaving pigmentation or atrophic scarring after healing. In addition, the disease usually occurs in winter and heals on its own in summer, and the same area can have repeated attacks. Once the early symptoms of frostbite appear, you should use frostbite cream in time to promote local blood circulation, pay attention to cold protection and warmth, and strengthen your body to enhance cold resistance. Pay attention to a light diet and avoid spicy and stimulating foods.