Type 1 diabetes is known as a chronic medical condition in which the pancreas can’t produce sufficient insulin. The function of insulin is to convert sugar into energy. When body cells do not get sufficient insulin due to poor functionality of the pancreas, Sugar accumulates in the blood and creates several health complications. Some of them may be life-threatening too. In this scenario, the individual patient suffering from Type 1 diabetes needs to take insulin for whole life. People normally suffer from this disease since their childhood. but sometimes it is also found in 30 to 40 years old people.
Source: https://www.medicinenet.com/type_1_diabetes_pictures_slideshow/article.htm