Chilblains can recur because, in addition to cold being the primary cause, many other factors such as the skin's moisture, abnormalities in the microvasculature, autonomic dysfunction, malnutrition, anemia, and endocrine disorders might also contribute to the condition. Additionally, lack of exercise, excessive sweating of the hands and feet, overly tight shoes and socks, and prolonged outdoor work can also promote the occurrence of chilblains. Thus, chilblains are a multifactorial disease. The best way to prevent recurrence is through preventive measures. These include: first, strengthening physical exercise to promote peripheral circulation and enhance the body's ability to adapt to the cold; second, early in the early winter season, it is important to prevent cold, frostbite, and dampness, stay warm, and avoid wearing tight shoes and socks; third, once exposed to cold, one should not immediately warm up by a fire or soak in hot water; fourth, irradiating the affected areas with infrared before winter or frequently soaking feet in hot water can also help in preventing chilblains.