Type 1 diabetes mellitus (also called childhood diabetes) occurs when the pancreas stops making insulin. Insulin helps the body use the energy that foods provide. Without insulin, blood sugar levels become high. Over time, high blood sugar levels can lead to blindness, kidney failure, damage to nerves, and heart disease. To keep blood sugar levels in the normal range, people with type 1 diabetes must inject insulin and monitor their diet and exercise. Psychological issues can interfere with a patient's ability and confidence to manage their diabetes, and it is possible that psychological treatments could improve diabetes control.