Many diabetic patients who have had the disease for several years only checked fasting blood sugar and urine sugar and then started medication. There are many factors that contribute to the occurrence of diabetes and also cause many complications, so diabetic patients should do other related tests in addition to monitoring blood sugar. In addition to monitoring blood sugar the following tests should be done: 1. Glycosylated hemoglobin Glycosylated hemoglobin is the product of glucose combined with hemoglobin, which can reflect the average blood sugar level in the past 4-12 weeks and is an important indicator for long-term control of chronic complications. Normal is generally at 4-6%, 7& control <, >8% dangerous. 2, body mass index Obesity can lead to increased insulin resistance, making the control of blood sugar more difficult; it can also increase the risk of cardiovascular and cerebrovascular diseases. Therefore, diabetic patients should pay close attention to weight and try to keep weight in the normal range BMI = weight (K)/height (O), diabetic patients should try to make body mass index reach or close to 24K/O. 3.75g glucose tolerance test Oral glucose tolerance test, adults need to take 75g of anhydrous glucose orally; children take 1.75g/K of sugar, the maximum sugar intake of 75g 4.Foot Examination The diabetic foot is one of the most serious and costly chronic complications for diabetics to treat, with foot ulcers occurring in about 15% of diabetics. Compared to people without diabetes, people with diabetes have about a 40-fold increased risk of amputation, and about 85% of amputations are triggered by foot ulcers. Early and proper prevention and treatment can save 45%-85% of patients from amputation. 5. Fundus examination Diabetic retinopathy is one of the serious chronic complications of diabetes and is the main cause of blindness in diabetic patients. Diabetic patients should have a fundus examination as soon as they are diagnosed, at least once a year, to observe the progression of fundus lesions, and never wait until their vision is blurred before doing the examination. 6. Urine microalbuminuria Microalbuminuria is an early sign of diabetes affecting the kidneys. Patients with type 2 diabetes who develop microalbuminuria have a high risk of developing serious kidney complications. Once microalbuminuria develops into proteinuria, further reduction of kidney function will be inevitable. 7.Insulin function test (insulin, C-peptide, insulin/C-peptide release test) Pancreatic tissue is an important endocrine organ of human body, which secretes insulin to promote the uptake and utilization of glucose by liver, muscle and fat tissues, and it is the only hormone in human body to lower blood sugar. C-peptide is the only peptide in the body that lowers blood glucose.