Fever in the hands and feet usually belongs to yin deficiency, but not all fever in the hands and feet is caused by yin deficiency. Yin deficiency is due to the lack of yin fluid, not able to check and balance the yang qi, resulting in the externalization of the deficiency yang, the appearance of fever in the hands and feet, yin deficiency may also be accompanied by a dry throat and mouth, fever, sweating, short and red urination (small amount of urination, dark yellow color), dry stools, night sweating (sweating abnormally after going to sleep, waking up sweating stops), insomnia, dreaming, heartburn, and other symptoms. Patients with hot hands and feet should avoid spicy and stimulating food, pay attention to rest, and maintain a good mood. If the phenomenon of fever in the hands and feet occurs, it is recommended to go to a regular hospital in time, and be treated by a Chinese doctor to identify the symptoms, so as not to delay the condition.