Inadequate blood supply to the fingers is related to abnormalities in the local blood circulation, and the main causes of the corresponding conditions include atherosclerosis, arteritis, decreased cardiac output, poor physical condition, and injuries. 1. Atherosclerosis: Atherosclerosis caused by high blood pressure, high blood lipids, and high blood sugar will affect the peripheral blood vessels, which will further lead to insufficient blood supply to fingers. 2. Arteritis: correlated with immune factors, after arteritis occurs, the wall of the blood vessel will be thickened, which will further lead to the abnormal function of local blood circulation, resulting in insufficient blood supply to the fingers. 3. Decreased cardiac output: Abnormal cardiac function leads to decreased cardiac output, which also affects peripheral blood supply. 4. Poor physical condition: Decrease in physical condition and abnormal functioning of various body indicators will also affect blood circulation and cause insufficient peripheral blood supply. 5. Injury: Local tissue trauma or frostbite and other causes of abnormal vascular conditions will also affect the peripheral blood supply, resulting in inadequate blood supply. Apparently inadequate blood supply to the fingers, accompanied by local numbness, pain and other symptoms, you need to consult a doctor in a timely manner for examination, after diagnosis of the condition under the guidance of the clinician to carry out standardized treatment, to avoid delays in the condition.