The exact cause of Diabetes Type 1 is still unknown. However, following are the most likely causes of Diabetes Type 1. - Genetic influence - Environmental factors - Exposure to mutagens The symptoms of Diabetes Type 1 are - Polydipsia - Polyuria - Enuresis - Polyphagia - Unexplained and unintended weight loss - Mood swings/Mood changes - Visual disturbances - Exhaustion and fatigue - Slow-healing wounds Diagnostic tests for Diabetes Type 1 are - Fasting blood glucose greater than or equal to 126 mg/dL - Random plasma glucose greater than or equal to 200 mg/dL - Oral Glucose Test (OGT) greater or equal to 75gm - HbA1C level greater than or equal to 6.5% Treatment of Diabetes Type 1 is to control glucose level by the administration of insulin and managing symptoms and complications.