Type 1 diabetes is a chronic condition that occurs when the pancreas produces little to no insulin. Because insulin is essential for controlling blood sugar, early diagnosis and treatment are critical for protecting your health.
Whether you’re looking for information for yourself or a loved one, this page walks you through how type 1 diabetes is diagnosed and the treatment options used to manage it effectively.
At Banner Health, our diabetes specialists are here to support you from diagnosis through long-term care.
Type 1 diabetes is an autoimmune condition. This means the body’s immune system mistakenly attacks and destroys the insulin-producing cells in the pancreas.
Without insulin, glucose (blood sugar) cannot move from the bloodstream into the body’s cells to be used for energy. As a result, blood sugar levels rise quickly and can become dangerous without treatment.
Type 1 diabetes often develops in children, teens or young adults, but it can be diagnosed at any age.
If your health care provider suspects type 1 diabetes, diagnosis begins with a review of your medical history, a physical exam and blood testing.
Your provider may ask about:
During the exam, your provider will look for signs such as unexplained weight loss, frequent urination, excessive thirst and exhaustion.
Blood tests are essential for confirming a type 1 diabetes diagnosis. In addition to measuring blood sugar levels, your provider will often check for specific antibodies that indicate an autoimmune response against the pancreas.
Depending on the test, you may need to fast beforehand. Your provider will give you instructions.
Hemoglobin A1c (HbA1c) test
The HbA1c test measures your average blood sugar levels over the past two to three months.
Fasting is not required.
Random blood glucose test
Also called a random plasma glucose (RPG) test, this test can be done at any time using a finger prick or blood drawn from a vein.
Fasting plasma glucose (FPG) test
This test is done after fasting for eight to 10 hours.
Oral glucose tolerance test (OGTT)
The OGTT evaluates how your body processes sugar.
You will:
Two-hour results:
If diabetes is diagnosed, your provider may order additional blood tests to detect diabetes-related antibodies. These tests help distinguish type 1 diabetes from type 2 diabetes, which is important because treatment approaches differ.
Your provider may also check your eyes, kidneys and heart to evaluate overall health and screen for early diabetes-related changes.
Being diagnosed with type 1 diabetes can feel overwhelming. With early diagnosis, education and consistent treatment, many people with type 1 diabetes live healthy, active lives.
Treatment focuses on keeping blood sugar levels within a healthy range to reduce symptoms and prevent complications.
Your diabetes care team may include primary care providers, endocrinologists, diabetes educators, dietitians, pharmacists and other specialists.
All people with Type 1 diabetes need insulin every day. Insulin replaces what the pancreas can no longer produce and is essential for survival.
Insulin may be delivered:
Types of insulin include:
Your provider will help determine the right insulin types and dosing schedule for you.
Monitoring blood sugar is a core part of Type 1 diabetes treatment. It helps you and your care team understand how insulin, food, activity and illness affect your levels.
Monitoring methods may include:
Your provider will recommend how often to check your levels and how to respond to changes.
Education is essential for managing Type 1 diabetes safely. You and your loved ones will learn how to:
Understanding the condition supports informed decision-making and long-term health.
Along with insulin, managing carbohydrate intake is a key part of treatment. Carbohydrate counting helps match insulin doses to the foods you eat, supporting better blood sugar control.
A registered dietitian or diabetes educator can help guide meal planning and carb counting strategies.
Regular physical activity supports overall health and can affect blood sugar levels. Your provider can help you plan safe ways to stay active and adjust insulin or meals as needed.
Some people with type 1 diabetes may also need medications to manage related conditions, such as:
These medications help protect long-term health.
Stress can impact blood sugar levels. Learning stress-reduction techniques such as relaxation exercises, meditation or mindfulness can support better diabetes control.
Ongoing medical care allows your provider to:
Keeping up with appointments is an important part of treatment.
Your diabetes care team will help you prepare for emergencies such as:
Family members, friends and coworkers should know your emergency plan and how to help if needed.
Managing type 1 diabetes requires daily attention, education and support. By making small, consistent adjustments and staying connected with your care team, you can take control of your health.
If you have questions or concerns, talk with your provider or connect with the diabetes care team at Banner Health.
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