It is not scientific to say that cold feet are a warning against cancer because many diseases may cause cold feet, such as cold weather, vasculitis, endocrine disorders, anemia and so on. 1. Cold weather: When the weather is cold, the capillaries at the distal end of the feet will shrink, resulting in the heat not being adequately transmitted, causing cold feet. This is a normal physiological phenomenon, usually in the temperature of the environment, will soon be able to return to normal. 2. Vasculitis: this disease can cause lower limb capillary blockage, affecting the blood circulation of the feet, which in turn shows numbness of the limbs, cold feet and other symptoms. 3. Endocrine disorders: endocrine disorders can cause abnormal functioning of the autonomic nervous system, resulting in vasoconstriction, reduced blood flow, and the phenomenon of cold feet. 4. Anemia: Anemia will lead to a decrease in hemoglobin and a decrease in oxygen supply to tissues and organs, which will easily cause cold feet. This situation usually occurs when the anemia is severe, so it should be taken seriously. To summarize, there are many reasons for cold feet, which should not be used to determine that you have cancer. If the symptoms persist for a long time or are accompanied by other discomforts, it is necessary to pay attention to them and seek medical treatment in time.