Type 1 diabetes results from beta cell destruction and insulin deficiency. It typically develops in younger people and requires lifelong insulin treatment. Type 2 diabetes involves insulin resistance where cells do not respond properly to insulin. It usually develops in older, overweight individuals and can sometimes be managed with lifestyle changes and oral medications instead of insulin. Diabetes can also be caused by excess hormones from conditions like Cushing's syndrome. Management involves lifestyle modifications, glucose monitoring, medications, and treatment of complications by a multidisciplinary team.