According to the International Diabetes Federation (IDF), over 100 million people worldwide with diabetes rely on daily insulin injections and needle-based treatments to control their blood sugar. In addition to the pain, they often encounter problems like medication leakage, bruising, bleeding, and fat accumulation at injection sites. Insulin pens also require strict storage conditions, careful handling, and the need to carry spare needles and insulin, all of which further reduce patient adherence and negatively affect treatment outcomes.