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Dexcom Continuous Glucose Monitoring | Dexcom CGM
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Product Frequently Asked Questions

We’ve gathered together answers to some of the most common questions. Please check to see if the answer to your question can be found here. If you still have questions, our Customer Service team would be happy to help. You can use the search box to answer your question or browse the list of topics below.

Your First 10 Days with Dexcom ONE

  • How do I use Dexcom ONE to make treatment decisions?

  • How do I replace my sensor and start a new sensor session?

  • Are there any iPhone/iOS settings I should or shouldn’t use with my Dexcom ONE app?

  • Are there any Android/OS settings I should or shouldn’t use with my Dexcom ONE app?

  • Can I shower or swim while wearing my Dexcom ONE?

  • How do I keep my sensor on for the full 10-day wear?

  • How do I properly remove the sensor adhesive?

  • What does the Signal Loss alert mean?

  • My 10-day sensor session is going to end soon, and I want to change my sensor early. Can I change the sensor now?

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