Type 1 diabetes complications begin happening after how many years?

Many factors: Many factors contribute to the complications of diabetes. The duration of the disease is definitely an important and in my experience it takes usually 10 years for significant complications. The rate of complications is also very much determined by the level of control. Very good control of blood sugar, blood pressure, lipids, and a good diet can delay diabetic complications by many years.

Time may vary : Time may vary depending on the individual.