Finger blood glucose measurements are not necessarily higher than venous blood. Usually glucose meters measure blood glucose using capillary whole blood, whereas laboratories test for venous plasma or serum glucose. With plasma calibrated glucose meters, fasting values are closer to laboratory values, and capillary glucose is slightly higher than venous glucose after a meal or sugar intake. Clinical blood glucose measurement often uses fingertip blood collection and venous blood sampling methods, and the measurement time is mostly selected overnight fasting, 2 hours after meals. Fingertip blood collection is done by piercing the skin with a blood pen, waiting for the blood to flow out, and dropping the blood into the test strip on the blood glucose meter to measure blood glucose through the conversion of chemical signals into electrical signals. Venous blood sampling, on the other hand, is done by drawing venous blood, separating the glucose in the serum by centrifugation, and then oxidizing it by the glucose oxidase method for spectroscopic analysis on a biochemical analyzer to measure the glucose concentration. Studies have shown that venous blood sampling is more accurate, less inaccurate and less affected by external influences, while fingertip blood sampling may result in low blood glucose values due to the squeezing of the blood, which may cause part of the tissue fluid to enter the blood, or contamination of the blood due to insufficient disinfection of the fingertip. It is recommended that patients with the above conditions go to regular hospitals for timely consultation and standardized blood glucose measurement under the guidance of endocrinologists to avoid delays in their conditions.