You must program the pump to deliver insulin when you want it. And you must still monitor your blood sugar, many times a day. Wearing an insulin pump will probably require more work on your part than traditional injection therapy. An insulin pump contains a small reservoir of insulin, a small battery-powered pump, and a computer that controls its operation. Some are waterproof, some are not.
Different pumps have different features.
As you consider a pump, be sure to learn about each pump's features so you can choose the pump that best matches your needs. The basal rate is a small amount of insulin delivered continuously throughout the day. This insulin keeps blood sugars in check between meals and during the night. Pumps allow you to program different basal rates based on time of day. For example, you can program the pump so you receive less insulin at night than you do during the day.