Skip to content
WebMD: Better information. Better health.
 
Other search tools:Symptoms|Doctors|Medical Dictionary

Diabetes Health Center

Font Size
A
A
A

Type 2 Diabetes

Type 2 diabetes, often called non-insulin dependant diabetes, is the most common form of diabetes, affecting 90%-95% of the nearly 24 million people with diabetes in the U.S.

Unlike people with type 1 diabetes, people with type 2 diabetes produce insulin; however, the insulin their pancreas secretes is either not enough or the body is unable to recognize the insulin and use it properly. This is called insulin resistance. When there isn't enough insulin or the insulin is not used as it should be, sugar (glucose) can't get into the body's cells. When sugar builds up in the blood instead of going into cells, the body's cells are not able to function properly. Other problems associated with the build up of sugar in the blood include:

  • Dehydration. The build up of sugar in the blood can cause an increase in urination (to try to clear the sugar from the body). When the kidneys lose the sugar through the urine, a large amount of water is also lost, causing dehydration.
  • Hyperosmolar nonketotic diabetic coma . When a person with type 2 diabetes becomes severely dehydrated and is not able to drink enough fluids to make up for the fluid losses, they may develop this life-threatening complication.
  • Damage to the body. Over time, the high sugar levels in the blood may damage the nerves and small blood vessels of the eyes, kidneys, and heart and predispose a person to atherosclerosis (hardening) of the large arteries that can cause heart attack and stroke.

Who Gets Type 2 Diabetes?

Anyone can get type 2 diabetes. However, those at highest risk for the disease are those who are obese or overweight, women who have had gestational diabetes, people with family members who have type 2 diabetes, and people who have metabolic syndrome (a cluster of problems that include high cholesterol, high triglycerides, low good 'HDL' cholesterol and a high bad 'LDL' cholesterol, and high blood pressure). In addition, older people are more susceptible to developing the disease since aging makes the body less tolerant of sugars.

What Causes Type 2 Diabetes?

Although it is more common than type 1 diabetes, type 2 diabetes is less well understood. It is likely caused by multiple factors and not a single problem.

Type 2 diabetes can run in families, but the exact nature of how it's inherited or the identity of a single genetic factor is not known.

What Are the Symptoms of Type 2 Diabetes?

The symptoms of type 2 diabetes vary from person to person but may include:

  • Increased thirst.
  • Increased hunger (especially after eating).
  • Dry mouth.
  • Nausea and occasionally vomiting.
  • Frequent urination.
  • Fatigue (weak, tired feeling).
  • Blurred vision.
  • Numbness or tingling of the hands or feet.
  • Frequent infections of the skin, urinary tract, or vagina.

Rarely, a person may be diagnosed with type 2 diabetes after presenting to the hospital in a diabetic coma.

WebMD Medical Reference

Is This Normal?

Get the Facts Fast!
Check Your Blood Sugar Level Now
What type of diabetes do you have?
Your gender:
Answer:

Your level is currently NormalHigh (hyperglycemia).Low (hypoglycemia).

If the level is below 70 and you are experiencing symptoms such as shaking, sweating or difficulty thinking, you will need to raise the number immediately. A quick solution is to eat a few pieces of hard candy or 1 tablespoon of sugar or honey. Recheck your numbers again in 15 minutes to see if the number has gone up. If not, repeat the steps above or call your doctor.

People who experience hypoglycemia several times in a week should call their health care provider. It's important to monitor your levels each day so you can make sure your numbers are within the range. If you are pregnant always consult with your health care provider.

If the level is below 70 and you are experiencing symptoms such as shaking, sweating or difficulty thinking, you will need to raise the number immediately. A quick solution is to eat a few pieces of hard candy or 1 tablespoon of sugar or honey. Recheck your numbers again in 15 minutes to see if the number has gone up. If not, repeat the steps above or call your doctor.

People who experience hypoglycemia several times in a week should call their health care provider. It's important to monitor your levels each day so you can make sure your numbers are within the range. If you are pregnant always consult with your health care provider.

Your blood sugar level is slightly high. You should call your health care provider and ask if laboratory tests to check for diabetes are needed. If you are pregnant always consult with your health care provider.

Congratulations on taking steps to manage your health.

However, it's important to continue to track your numbers so that you can make lifestyle changes if needed. If you are pregnant always consult with your physician.

Your level is currently normal. However, if you are concerned about diabetes speak with your physician. There may be other risk factors that increase your risk for diabetes.

Your level is high if this reading was taken before eating. Aim for 70-130 before meals and less than 180 two hours after meals.

Even if your number is high, it's not too late for you to take control of your health and lower your blood sugar.

One of the first steps is to monitor your levels each day. If you are pregnant always consult with your physician.

Your blood sugar level may be high, depending on when you last ate. If you have not eaten for at least 8 hours, your blood sugar should be less than 100. If you've eaten within the last 2 hours, your blood sugar should be less than 140. You should call your health care provider and ask if you need laboratory tests to check for diabetes. If you are pregnant always consult with your health care provider.

Blood sugars consistently above 180 warrant prompt medical attention.

Even if your number is high, it's not too late for you to take control of your health and lower your blood sugar.

One of the first steps is to monitor your levels each day. If you are pregnant always consult with your physician.

Your blood sugar level is high. You should call your health care provider and ask if laboratory tests to check for diabetes are needed. If you are pregnant always consult with your health care provider.

Become a Rite Aid wellness+ for diabetes member and get:

  • Diet tips and fitness ideas
  • Tools and trackers to help monitor your blood sugar and more
  • Special offers and money-saving coupons
Sign up for FREE

I am already a wellness+ member

This tool is not intended for women who are pregnant.

Today in Diabetes

Woman holding cake
Slideshow
feet
Slideshow
 
man organizing pills
Slideshow
Close up of eye
Slideshow
 

Woman serving fast food from window
Video
Can Vinegar Treat Diabetes
Video
 
Middle aged person
Tool
are battery operated toothbrushes really better
Video
 

Prediabetes How to Prevent Type 2 Diabetes
Article
type 2 diabetes
Slideshow
 
food fitness planner
Tool
Are You at Risk for Dupuytrens Contracture
Article
 

WebMD Special Sections