Diabetes is hereditary and children of diabetic patients are definitely more likely to get diabetes than children of non-diabetic patients. Both type 1 and type 2 diabetes have a genetic predisposition, with genetics having a slightly higher impact on the onset of the disease than the environment, accounting for 50% to 60%. They inherit not diabetes itself, but a susceptibility to diabetes, and these people are more likely to get diabetes than the general population. The genetic predisposition is more pronounced in type 2 diabetes than in type 1 diabetes. However, this does not mean that “dragons give birth to phoenixes and mice give birth to children who make holes” and that children of diabetic patients must get diabetes. Studies have shown that even if both parents are type 2 diabetic, the prevalence of diabetes in their children does not exceed 20.0%. This is often the case, the children of diabetic patients know more about diabetes, the dangers of diabetes and diabetes prevention knowledge, they prevent the disease before it happens, usually pay more attention to diet and living, but not diabetes. Even if there is a mild increase in blood sugar, they will actively take measures so that the disease not only does not develop, but also can be alleviated. On the other hand, people who do not have a family history of diabetes often have less knowledge about diabetes and do not pay attention to self-protection regarding diabetes, and as a result, they become the first person in the family to get diabetes, and from then on, other members of the family are also considered people with a family history of diabetes. This is one of the examples of how good things can become bad things and bad things can become good things. So, diabetes is genetically predisposed, but it is preventable.