Diabetes mellitus occurs due to a dysfunction of the pancreas or a disorder of cell regulation, in which even sufficient insulin production does not help reduce blood sugar levels. Doctors include obesity, pancreatic pathologies, low physical activity, unfavorable heredity and other conditions as risk factors for the disease. Type 1 diabetes is usually diagnosed in men and women before age 30. Older people who are obese are more likely to have type II diabetes. At the same time, different types of disorders can occur in patients of any age, so you should not focus only on risk factors.