Common causes of body chills include environmental factors, lifestyle factors, medication factors, and disease factors. 1. Environmental factors: heat transfer in a cold environment or in cold water, convection and evaporation in windy or humid climates can lead to heat loss and chills. 2. Life factors: long-term poor diet, insufficient energy intake, the body can not produce enough heat to maintain normal consumption. After exercise, a lot of sweating without timely replacement of clothing or wiping sweat, sweat evaporation leads to the body surface heat is dissipated. 3. Drug factors: excessive use of antipyretic drugs such as acetaminophen, ibuprofen, etc., so that the body temperature fixed point downward, when the heat dissipation is greater than heat production, the above symptoms will also occur. 4. Disease factors ①Infection: Infection of the body leads to the upward shift of the thermoregulation point and fever, which is manifested in the early stage of fever by the constriction of blood vessels in the skin and the decrease of blood flow, which leads to the decrease of heat dissipation, the decrease of skin temperature, and the coldness of the body. ② anemia: anemia when the body’s effective circulating blood volume is insufficient to ensure the blood supply of important organs, resulting in a reduction in blood supply to the skin and mucous membranes, the symptoms of generalized chills. Hypothyroidism: the body’s metabolic rate decreases, leading to a decrease in heat production, which is manifested as body chills. Hypoglycemia: excessive excitation of sympathetic nerves leads to skin vasoconstriction and reduced blood flow to the skin and mucous membranes, which is manifested by symptoms such as generalized chills and profuse sweating. There are many causes of body chills. If the symptoms persist, worsen, or appear as a combination of symptoms, it is recommended to go to the hospital in time for a clear diagnosis and treatment under the guidance of the doctor, so as not to delay the condition.