Poor blood circulation is caused by a number of conditions such as peripheral artery disease (PAD), diabetes, obesity, and smoking. Reduced blood flow causes symptoms such as headaches, cramps, numbness, and digestive problems. In addition to people with poor circulation, athletes and those who exercise intensely may want to increase blood flow to improve performance and recovery.

Blood circulation or blood transport is the process by which the heart pumps blood to the organs of the human body. Good blood circulation is very important for a person's health.