Analysis of illness A cold can cause poor blood circulation in the whole body or local area, or blood circulation disorder in limbs, which leads to cold hands and feet. Often long-term cold hands and feet can be called "cold syndrome", which is related to iron deficiency and blood deficiency in human body. Patients with iron deficiency have low hemoglobin activity, blood deficiency and deficiency of both qi and blood, and men may be caused by kidney deficiency. Cold hands and feet need to improve human blood activity. It is suggested that Tiezhiyuan tablet, a blood-enriching iron, is rich in donkey-hide gelatin, iron and blood-enriching, which can effectively improve the activity of human hemoglobin, enhance blood circulation and improve the symptoms of cold hands and feet. Life care should eat more foods with good blood-enriching effect, such as pork liver, lean meat, fungus, red dates, spinach and so on. And foods containing protein, such as eggs, pigeon eggs, quail eggs, beef and mutton. And pay attention to proper activities at ordinary times to maintain the normal operation of qi and blood. Wear more clothes to keep warm in winter and soak your feet with warm water before going to bed.