Sudden cold shivering may be a normal physiological phenomenon, or it can be caused by diseases, such as infections, neurological disorders, endocrine diseases. 1. Physiological phenomenon: If the temperature of the surrounding environment suddenly decreases or you wear less, it will lead to sudden cold shivering, which is also a normal physiological phenomenon and does not require special treatment. 2.Disease causes: (1) Infection: viral infection, bacterial infection, tuberculosis infection and so on in the body can make the body endogenous thermogenic source lead to the thermoregulatory center regulating point elevated, causing sudden cold shivering. (2) Neurological disorders: vegetative nerve disorders, central nervous disorders, can cause thermoregulatory dysfunction, can cause thermoregulatory abnormalities, sudden cold shivering. (3) endocrine diseases: unstable hormone levels during menopause can cause irregular expansion or contraction of blood vessels, resulting in sudden cold and hot; hypothyroidism can lead to generalized low metabolism, causing chills, fatigue and so on. Sudden cold shivering such as warmth does not improve, should promptly consult the doctor, under the guidance of the doctor for examination, to clarify the cause and give targeted treatment.