Circulation refers to the flow of blood throughout the body’s blood vessels and the heart. The circulatory system is a vital part of the body and if it is not functioning correctly, it can cause high or low blood pressure, hardening of the arteries, valve problems, arteriosclerosis, varicose veins, chilblains, hemorrhoids and leg ulcers. Circulation can be improved through exercise, breathing techniques, herbal medicine, traditional Chinese medicine, acupuncture, acupressure, massage, hydrotherapy, physical therapies, yoga and kinesiology.