An insulin pump is a small medical device used by people with diabetes to deliver insulin continuously throughout the day. It is typically worn on the body and connected to a catheter that inserts under the skin. The pump can be programmed to release different amounts of insulin based on the user's needs, helping to maintain stable blood sugar levels. Insulin pumps can be adjusted for various activities, meals, and times of day, providing flexibility and convenience. They often come with features like bolus calculators and reminders, making it easier for users to manage their condition effectively.