Some factors led to diseases on collateral,such as six climatic pathogenic factors,emotion,overstrain,traumatic injury,chronic diseases,chronic pain,deficiency of collateral ect.

• 络病的形成,多因六淫外邪、情志、劳倦、跌仆等损伤脉络,或久病、或久痛、或络脉空虚皆可导致络脉病变,形成络病。