Diabetes means that your blood sugar is too high. Your blood always has some sugar in it because the body uses sugar for energy; it’s the fuel that keeps you going. But too much sugar in the blood is not good for your health.

Your body changes most of the food you eat into sugar. Your blood takes the sugar to the cells throughout your body. The sugar needs insulin to get into the body’s cells. Insulin is a hormone made in the pancreas, an organ near the stomach. The pancreas releases insulin into the blood. Insulin helps the sugar from food get into body cells. If your body does not make enough insulin or the insulin does not work right, the sugar can’t get into the cells, so it stays in the blood. This makes your blood sugar level high, causing you to have diabetes.

If not controlled, diabetes can lead to blindness, heart disease, stroke, kidney failure, amputations (having a toe or foot removed, for example), and nerve damage. In women, diabetes can cause problems during pregnancy and make it more likely that your baby will be born with birth defects.

What is pre-diabetes?

Pre-diabetes means your blood sugar is higher than normal but lower than the diabetes range. It also means you are at risk of getting type 2 diabetes and heart disease. The good news is: You can reduce the risk of getting diabetes and even return to normal blood sugar levels with modest weight loss and moderate physical activity. If you are told you have pre-diabetes, have your blood glucose (sugar) checked again in 1 to 2 years.

The three main types of diabetes are:

  • Type 1 diabetes is commonly diagnosed in children and young adults, but it’s a lifelong condition. If you have this type of diabetes, your body does not make insulin, so you must take insulin every day. Treatment for type 1 diabetes includes taking insulin shots or using an insulin pump, eating healthy, exercising regularly, taking aspirin daily (for some), and controlling blood pressure and cholesterol.
  • Type 2 diabetes is the most common type of diabetes — about 9 out of 10 people with diabetes have type 2 diabetes. You can get type 2 diabetes at any age, even during childhood. In type 2 diabetes, your body makes insulin, but the insulin can’t do its job, so sugar is not getting into the cells. Treatment includes taking medicine, eating healthy, exercising regularly, taking aspirin daily (for some), and controlling blood pressure and cholesterol.
  • Gestational diabetes occurs during pregnancy. This type of diabetes occurs in about 1 in 20 pregnancies. During pregnancy your body makes hormones that keep insulin from doing its job. To make up for this, your body makes extra insulin. But in some women this extra insulin is not enough, so they get gestational diabetes. Gestational diabetes usually goes away when the pregnancy is over. Women who have had gestational diabetes are more likely to develop type 2 diabetes later in life.