It is not scientific to say that diabetes is inherited for generations; diabetes is the result of a combination of genetic and environmental factors that may or may not develop in future generations. The most common types of diabetes are type 1 diabetes and type 2 diabetes. The most common types of diabetes are type 1 diabetes and type 2 diabetes. Type 1 diabetes is caused by viral infections, chemical toxins, and other external factors that act on genetically susceptible individuals to activate a series of autoimmune responses mediated by T-lymphocytes, which ultimately lead to the development of diabetes. The rate of type 1 diabetes in identical twins is 30% to 40%. Type 2 diabetes mellitus is also a complex polygenic disease caused by a combination of genetic and environmental factors. There are many genes that contribute to the development of the disease, but they only confer individual susceptibility, which is not enough to cause the disease completely. There are also specific types of diabetes, such as mitochondrial diabetes, which are mostly inherited from the mother’s side of the family, and mutated genes in males are usually not passed on to the offspring. Therefore, it has not yet been possible to fully elucidate how many generations diabetes can be inherited, and the probability of diabetes occurring in the offspring of diabetic patients is high, but not the certainty of developing the disease. Patients with a family history of diabetes should have regular blood glucose monitoring and maintain a healthy lifestyle and diet, which can help prevent the development of diabetes to a certain extent. It is advisable to seek medical attention if diabetes is suspected or if abnormal blood glucose values occur.