After the blood flow of the main blood vessel (artery or vein) in a certain part of the body is blocked, the blood vessels of the original anastomotic branch of the part expand and form bypasses, so that the blood passes through these bypasses in a roundabout way and restores the circulation, this circulatory pathway is called “collateral circulation”, also called “compensatory circulation This circulatory pathway is called “collateral circulation”, also known as “compensatory circulation”. Inadequate development of the collateral circulation means that these bypasses are not sufficiently developed, which still affects the circulation and can cause various cardiovascular diseases. What are the reasons for the underdevelopment of the collateral circulation? 1, there are not enough anastomotic branches between blood vessels. 2.Vascular obstruction occurs at a rapid rate. 3.The collateral circulation is often not sufficiently established in time. 4, anastomotic branch vessels are not normal. The collateral circulation of coronary artery, the collateral circulation of portal vein, the collateral circulation of cerebral artery, and the collateral circulation of aorta can cause related diseases if the collateral circulation is not sufficiently developed. There is no anastomotic branch between vessels, obstruction of vessels occurs quickly, collateral circulation is often not established sufficiently in time, branch vessels are not normal, and other reasons. Patients with poorly developed collateral circulation need to maintain an optimistic and happy mood. Long-term mental tension, anxiety, irritability, pessimism and other emotions will make the balance of cortical excitation and inhibition process out of balance, so it is necessary to maintain a happy mood.