Type 1 diabetes mellitus is a chronic autoimmune disease characterized by the destruction of insulin-producing beta cells in the pancreas, leading to an absolute insulin deficiency. As a result, individuals with Type 1 diabetes require lifelong insulin therapy to regulate their blood glucose levels and prevent the development of severe health complications.

Common symptoms include increased thirst, frequent urination, unexplained weight loss, and blurry vision. The exact cause of Type 1 diabetes is unknown, but it is believed to result from a combination of genetic and environmental factors. Regular monitoring of blood glucose levels, a balanced diet, physical activity, and self-care practices are important in managing this condition and reducing the risk of complications.

Note: This is a general description. Please take professional health advice.