Whether hyperglycemia is hereditary is mainly based on which diseases cause hyperglycemia. There are primary and secondary diseases that cause hyperglycemia, and the possibility of inheritance of primary hyperglycemia is high. Type I and II diabetes are common types of primary diabetes, while secondary hyperglycemia is generally not inherited. I. Primary hyperglycemia: The causes of type I diabetes are mostly genetic factors, autoimmune defects and viral infections, and the genetic tendency is lower than that of type II diabetes; while type II diabetes is a type of diabetes that is clinically common, accounting for about 90% or more of the total number of people with diabetes. Type II diabetes is highly heritable. If one parent has diabetes, the risk of developing diabetes in children is several times higher than normal, and if both parents have diabetes, the risk of developing diabetes in children is even higher. The occurrence of type II diabetes is mainly related to genetic factors and environmental factors. Among the environmental factors, obesity is the main cause of type II diabetes. When obesity occurs, fat cells proliferate and hypertrophy, and the metabolites secreted can inhibit the transduction of skeletal muscle pancreatic islet cells, leading to the occurrence of hyperinsulinemia. Moreover, the inheritance of type II diabetes is polygenic, which means that the organism has many genes that carry the bad gene of diabetes and are easily passed on to the next generation. If children do not pay attention to weight control and become overweight, overweight and obese, diabetes can easily occur. Second, secondary hyperglycemia: such as patients with growth hormone tumor or acromegaly, hyperglycemia caused by excessive secretion of growth hormone, this kind of hyperglycemia is usually not inherited. In addition, when diffuse goiter with hyperthyroidism occurs, the level of thyroid hormone increases, resulting in hyperglycemia, and hyperglycemia caused by excessive secretion of adrenal cortical hormone, whether the disease is caused by hypothalamus, pituitary gland or adrenal cortex, hyperglycemia produced by excessive secretion of cortical hormone is less likely to be inherited.