What is Diabetes?

With diabetes, your body either doesn’t make enough insulin or can’t use it as well as it should.

Diabetes is a chronic (long-lasting) health condition that affects how your body turns food into energy.

Your body breaks down most of the food you eat into sugar (glucose) and releases it into your bloodstream. When your blood sugar goes up, it signals your pancreas to release insulin. Insulin acts like a key to let the blood sugar into your body’s cells for use as energy.

With diabetes, your body doesn’t make enough insulin or can’t use it as well as it should. When there isn’t enough insulin or cells stop responding to insulin, too much blood sugar stays in your bloodstream. Over time, that can cause serious health problems, such as heart disease, vision loss, and kidney disease.

There isn’t a cure yet for diabetes, but losing weight, eating healthy food, and being active can really help. Other things you can do to help:

• Take medicine as prescribed.
• Make and keep health care appointments.

Diabetes by the Numbers

• About 38 millionUS adults have diabetes, and 1 in 5 of them don’t know they have it.
• Diabetes is the eighth leading causeof death in the United States.
• Diabetes is the  1cause of kidney failure, lower-limb amputations, and adult blindness.
• In the last 20 years, the number of adults diagnosed with diabetes has more than doubled.

Types of Diabetes

There are three main types of diabetes: type 1, type 2, and gestational diabetes (diabetes while pregnant).

Type 1 Diabetes

Type 1 diabetes is thought to be caused by an autoimmune reaction (the body attacks itself by mistake). This reaction stops your body from making insulin. Approximately 5-10% of the people who have diabetes have type 1. Type 1 diabetes can be diagnosed at any age, and symptoms often develop quickly. If you have type 1 diabetes, you’ll need to take insulin every day to survive. Currently, no one knows how to prevent type 1 diabetes.

Type 2 Diabetes

With type 2 diabetes, your body doesn’t use insulin well and can’t keep blood sugar at normal levels. About 90-95% of people with diabetes have type 2. It develops over many years and is usually diagnosed in adults (but more and more in children, teens, and young adults). You may not notice any symptoms, so it’s important to get your blood sugar tested if you’re at risk. Type 2 diabetes can be prevented or delayed with healthy lifestyle changes, such as:

• Losing weight.
• Eating healthy food.
• Being active.

Gestational Diabetes

Gestational diabetes develops in pregnant women who have never had diabetes. If you have gestational diabetes, your baby could be at higher risk for health problems. Gestational diabetes usually goes away after your baby is born. However, it increases your risk for type 2 diabetes later in life. Your baby is more likely to have obesity as a child or teen and develop type 2 diabetes later in life.

Prediabetes

In the United States, about 98 million adults—more than 1 in 3—have prediabetes. More than 8 in 10 of them don’t know they have it. With prediabetes, blood sugar levels are higher than normal, but not high enough for a type 2 diabetes diagnosis. Prediabetes raises your risk for type 2 diabetes, heart disease, and stroke. But there’s good news. If you have prediabetes, a CDC-recognized lifestyle change program can help you take healthy steps to reverse it.

Diabetes Risk Factors

Know the risk factors for different types of diabetes.

Type 1 Diabetes

Type 1 diabetes is thought to be caused by an immune reaction (the body attacks itself by mistake). Risk factors for type 1 diabetes are not as clear as for prediabetes and type 2 diabetes. Known risk factors include:

• Family history: Having a parent, brother, or sister with type 1 diabetes.
• Age: You can get type 1 diabetes at any age, but it usually develops in children, teens, or young adults.

In the United States, White people are more likely to develop type 1 diabetes than African American and Hispanic or Latino people.

Currently, no one knows how to prevent type 1 diabetes.

Type 2 Diabetes

You’re at risk for type 2 diabetes if you:

• Have prediabetes.
• Are overweight.
• Are 45 years or older.
• Have a parent, brother, or sister with type 2 diabetes.
• Are physically active less than 3 times a week.
• Have ever had gestational diabetes (diabetes during pregnancy) or given birth to a baby who weighed over 9 pounds.
• Are an African American, Hispanic or Latino, American Indian, or Alaska Native person. Some Pacific Islanders and Asian American people are also at higher risk.

If you have non-alcoholic fatty liver disease you may also be at risk for type 2 diabetes.

You can prevent or delay type 2 diabetes with proven lifestyle changes. These include losing weight if you’re overweight, eating a healthy diet, and getting regular physical activity.

Prediabetes

You’re at risk for prediabetes if you:

• Are overweight.
• Are 45 years or older.
• Have a parent, brother, or sister with type 2 diabetes.
• Are physically active less than 3 times a week.
• Have ever had gestational diabetes (diabetes during pregnancy) or given birth to a baby who weighed over 9 pounds.
• Are an African American, Hispanic or Latino, American Indian, or Alaska Native person. Some Pacific Islander and Asian American people are also at higher risk.

You can prevent or reverse prediabetes with proven lifestyle changes. These include losing weight if you’re overweight, eating a healthy diet, and getting regular physical activity. The CDC-led National Diabetes Prevention Program can help you make healthy changes that have lasting results.

Gestational Diabetes

You’re at risk for gestational diabetes (diabetes while pregnant) if you:

• Had gestational diabetes during a previous pregnancy.
• Have given birth to a baby who weighed over 9 pounds.
• Are overweight.
• Are more than 25 years old.
• Have a family history of type 2 diabetes.
• Have a hormone disorder called polycystic ovary syndrome(PCOS).
• Are an African American, Hispanic or Latino, American Indian, Alaska Native, Native Hawaiian, or Pacific Islander person.

Gestational diabetes usually goes away after you give birth, but increases your risk for type 2 diabetes. Your baby is more likely to have obesity as a child or teen, and to develop type 2 diabetes later in life.

Before you get pregnant, you may be able to prevent gestational diabetes with lifestyle changes. These include losing weight if you’re overweight, eating a healthy diet, and getting regular physical activity.

Diabetes Symptoms

Get your blood sugar tested if you have any of the symptoms of diabetes.

If you have any of the following diabetes symptoms, see your doctor about getting your blood sugar tested:

• Urinate (pee) a lot, often at night
• Are very thirsty
• Lose weight without trying
• Are very hungry
• Have blurry vision
• Have numb or tingling hands or feet
• Feel very tired
• Have very dry skin
• Have sores that heal slowly
• Have more infections than usual

Symptoms of Type 1 Diabetes

People who have type 1 diabetes may also have nausea, vomiting, or stomach pains. Type 1 diabetes can be diagnosed at any age, and symptoms can develop in just a few weeks or months and can be severe.

Symptoms of Type 2 Diabetes

Type 2 diabetes symptoms often take several years to develop. Some people don’t notice any symptoms at all. Type 2 diabetes usually starts when you’re an adult, though more and more children and teens are developing it. Because symptoms are hard to spot, it’s important to know the risk factors for type 2 diabetes. Make sure to visit your doctor if you have any of them.

Symptoms of Gestational Diabetes

Gestational diabetes (diabetes during pregnancy) usually doesn’t have any symptoms. If you’re pregnant, your doctor should test you for gestational diabetes between 24 and 28 weeks of pregnancy. If needed, you can make changes to protect your health and your baby’s health.