FAQs

How do I know the sensor is working properly?

To check the system is working simply switch on your reader, or use FreeStyle LibreLink, and scan over the sensor to get a glucose reading. If for any reason, the sensor does not work, an error message will appear on the reader or phone screen prompting you to replace the sensor.

If you have symptoms that do not match the FreeStyle Libre system reading or suspect your reading may be inaccurate, check the reading by doing a finger prick check using a blood glucose meter. If you are experiencing symptoms that are not consistent with your blood glucose readings, consult your healthcare professional.

What do I do if the sensor comes off before the end of 2 weeks?

A sensor that has been removed or that has fallen off cannot be reused. Start a new sensor. The Reader, or FreeStyle LibreLink app, will identify that it is a new sensor and ask if you want to start it.

What can I do if I get a skin reaction to the sensor?

To prevent skin irritation or discomfort, avoid using exactly the same site as the previous sensor. Some individuals may be sensitive to the adhesive that keeps the sensor attached to the skin. If you notice significant skin irritation around or under your sensor, remove the sensor and stop using the system. Contact your health care professional before continuing to use the system.

Can I still swim?

Libre sensors are water-resistant but are not waterproof. They can be worn while bathing, showering or swimming. Do not take your sensor deeper than 1 metre or immerse it in water for longer than 30 minutes.

What do I do at a water park/in the sea?

The movement of the water in a water park or in the sea on the sensor may cause it to loosen or come off, for example when doing water sports or sliding down a water chute. Another factor that can affect the sensor is the presence of chemicals in the water. Any activity that dries out the skin – like enjoying an evening in a hot tub – can affect the adhesion of a sensor.

Wearing a libreband which is a water-resistant armband will help to protect a sensor from the friction caused by swimming and being in the water, such as in a hot tub. Many Libre users including competitive athletes, have worn a libreband for swimming and water activities and have found it helpful for protection. It gives them confidence in the water whilst wearing a sensor, especially when doing so for an extended period.

How do I share my results with my GP and/or consultant?

You can share your results with your healthcare team using Libreview. This is a useful tool that allows people with diabetes to look at their data together with their healthcare team. Your diabetes team may send you an invitation to join Libreview or you can find step-by-step instructions for linking with your healthcare team in this course.

Can I see the data for my partner/child?

LibreLinkUp is a free mobile app for family, friends and caregivers to remotely monitor and support a person with diabetes using a FreeStyle Libre glucose sensor. You can remotely monitor glucose readings and trends, stay connected and manage their diabetes together.

What glucose reading do I need to be at in order to drive in the UK?

You should check your blood glucose before you drive and every 2 hours when driving. Before, after and while you drive, your blood glucose level should always be above 5 mmol/L.  If your glucose is 5 mmol/L or less, eat a snack and do not drive until the glucose is 5 mmol/L or higher.