A continuous glucose monitor (CGM) is a wearable device that measures glucose levels continuously through a sensor placed under the skin. It provides glucose readings and trends through a compatible receiver, smartphone, or other connected device.

A CGM uses a small sensor inserted under the skin to measure glucose in interstitial fluid. The sensor sends readings to a compatible receiver or smart device, allowing users to view glucose levels and trends.

CGMs provide continuous glucose information and can show glucose trends and alerts, depending on the system. This can offer more detailed information than occasional glucose measurements and support glucose monitoring as part of a healthcare plan.

Sensor wear time varies by CGM system and model. Different products may be designed for different wear periods, so users should check the manufacturer's specifications and follow the recommended replacement schedule.

Many modern CGM systems can connect to compatible smartphones through a dedicated app or other wireless technology. Compatibility varies by device, operating system, and model, so check the manufacturer's requirements before purchasing.

No. A CGM uses a wearable sensor to measure glucose levels at regular intervals and provides readings and trends over time, while a blood glucose meter provides an individual glucose reading from a blood sample. Both can have different roles in glucose monitoring.

CGM suitability depends on the individual's health needs, medical history, and the specific device. People considering CGM technology should consult their healthcare professional and follow the manufacturer's indications and instructions.