The causes of hot extremities may include yin deficiency and fire, infection, etc., as follows: 1. Yin deficiency and fire: hot extremities may be caused by yin deficiency and fire from the perspective of traditional Chinese medicine, often accompanied by soreness in the waist and knees, night sweats, insomnia and dreaminess, irritability, etc. Due to the deficiency of essence and blood and yin essence, internal heat will occur, resulting in hot hands and feet, which can be treated with regulating drugs, such as Liu Wei Di Huang Wan. 2. Infection factors: hot extremities may also be caused by 3, other factors: if suffering from severe anemia, tuberculosis, blood system diseases, may also have symptoms of hot extremities, should take targeted treatment.