What are known as new blood vessels are newly extended spiral capillaries from normal blood vessels. Under certain conditions such as pregnancy, the human body can produce new blood vessels. Aside from these conditions, the appearance of new blood vessels will trigger specific diseases, which are collectively referred to as "angiogenic diseases", such as cancer, rheumatoid arthritis, osteoarthritis, diabetic retinopathy, etc. At first glance, these diseases seem to have no causal relationship, but in fact, these diseases are all of the same type, belonging to angiogenic diseases.