First of all, it must be heavy and upsetting for parents when their child is found to be diabetic at such a young age, but is the child's illness related to his grandparents' consanguineous marriage?

Genetics are involved in all the factors that contribute to the development of diabetes.

The co-morbidity rate of type 1 diabetes in identical twins is 30-40%, suggesting that genetic factors play an important role in the development of type 1 diabetes, while much evidence supports type 1 diabetes as an autoimmune disease, with more pronounced immune factors.

In contrast, the homozygosity rate for identical twins with type 2 diabetes is close to 100%, so genetic factors are associated with a potentially greater influence on type 2 diabetes, but the onset and progression of the disease are highly variable depending on environmental factors.

In other words, even if a child's grandparents have diabetes and the child is affected by genetic factors, if the child is free from environmental factors such as poor dietary habits, sedentary lifestyle, and high mental stress in his or her early life, the chances of developing type 2 diabetes later in life will be relatively small.

Consanguineous marriages may lead to congenital heart disease, albinism, malformations, schizophrenia and other disorders due to denser concentration of disease-causing genes, and have not been found to affect diabetes based on current observations.

Nine-year-olds usually have type 1 diabetes, and immunologic factors may be influenced by genes, but the etiology and pathogenesis are not yet clear.

Nine-year-old children may also be type 2 diabetes, nowadays bad lifestyle such as fast food, sweets and so on make children become little chubby, obesity, appeared hyperlipidemia, diabetes and other metabolic diseases increased chances, now clinical found that children with type 2 diabetes is more and more.

There is no point in pursuing the grandparents when the child has already been diagnosed with diabetes. Inbreeding is a product of a particular era and will not be repeated in the future.

It is imperative that the child's habits are well developed and that the blood sugar is adjusted to the normal range by choosing the appropriate treatment plan according to the type of disease.

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The detection of diabetes in a nine-year-old boy had little to do with his grandparents' inbreeding, but one or both of the boy's parents must have had a history of diabetes.

The family genetic factor of diabetes is irresistible, and we can only delay the onset of diabetes by changing our diet, eating less sugary foods, exercising moderately, and having a regular routine.

Some people with diabetes do not have family genetic factors, but by the influence of lifestyle, analogous to a long time around the various social places, unrestrained overeating, no exercise. There are also factors such as pollution of the living environment and stressful living conditions that can trigger diabetes.

Children usually have type 1 diabetes, and the causes are complex and may be related to heredity, environment, gene mutation, viral infection and other factors. However, diabetes does not conform to Mendel's law, and the pattern of inheritance is not clear, not necessarily related to consanguineous marriages.

The child's parents are diabetic.