Diabetes is where your body struggles to control its levels of insulin. There are two types, and they can both provide barriers to everyday life.
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Diabetes, also known as diabetes mellitus, is a chronic health problem that affects the body’s ability to produce insulin or use the blood sugar (or blood glucose) effectively.
Blood sugar levels are regulated by a hormone called insulin which is produced by the beta cells of the pancreas. Insulin is a hormone that helps glucose get into the cells where it's needed.
The pancreas plays a vital role in diabetes. If a person becomes diabetic, it means that the pancreas isn’t able to produce enough insulin required for the body or cells aren’t able to make proper use of the insulin produced.
Diabetes is broadly divided into: Type 1, Type 2 and Gestational Diabetes.
Type 1 diabetes is a health condition in which your immune system destroys the insulin-producing beta cells of the pancreas. So, they cannot produce any insulin. It usually occurs in children, teenagers and young people but can also occur at any age.
Type 2 diabetes is a condition in which cells become insensitive to insulin and cannot make use of the blood sugar effectively. As a result, blood glucose levels go up. It's milder and more common than type 1, but can lead to serious complications in your eyes, nerves, kidney and heart. In type 2 diabetes, there are two connected problems: your cells respond poorly to insulin, so can’t make use of the blood sugar effectively. And sometimes your pancreas doesn’t produce enough insulin.
Gestational diabetes is a health condition which occurs in pregnant women. During pregnancy, sometimes the body becomes insulin resistant and so blood sugar levels rise. This type of diabetes usually goes away after birth.
Gestational diabetes is of two classes. Women with A1 class are able to control it with the help of proper diet and regular exercise. While those with A2 class have to take medicines or insulin shots.
There’s also a form of diabetes known as ‘Latent Autoimmune Diabetes of Adulthood’ (or LADA) which is sometimes informally called ‘diabetes 1.5’. This is currently classified as a form of type 1 diabetes, but shares similarities with type 2 - hence the ‘1.5’. Research is currently being undertaken to find out what seems to make it different from both type 1 and 2 diabetes.
Type 1 diabetes can affect anyone at any time, but type 2 diabetes is usually acquired later in life. You are more likely to get type 2 diabetes if you’re over 40 (or over 25 if you’re south Asian), have a family history of diabetes, or are overweight or obese. Type 1 diabetes is thought to be caused by an autoimmune reaction that destroys the cells in the pancreas that make insulin, called beta cells. This process can go on for months or years before any symptoms appear. Some people have certain genes that make them more likely to develop type 1 diabetes.
Gestational diabetes happens when your blood sugar gets too high during pregnancy, and your body can’t make enough insulin to regulate it. Like type 2 diabetes, you’re at a higher risk of getting gestational diabetes if you’re overweight or have a family history of diabetes.
A 2016 study suggested that 9% of men and 7.9% of women worldwide could be diagnosed as having diabetes: a number that has risen by 28.5% since 1980. So it’s common, and it’s on the rise. This is generally thought to be because the world’s population is getting older and heavier.
Type 2 diabetes is more common than type 1, with an estimated 90% of diabetes sufferers having type 2, but both are for life. But where type 1 is unavoidable, it’s possible to minimise the risk of getting type 2 diabetes by living a healthy lifestyle. This type is the main reason for diabetes becoming more common.
In the case of gestational diabetes, it’s estimated that 2%-10% of yearly pregnancies are affected by it.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
The cause of type 1 diabetes is often genetic. If any of your parents or siblings have type 1 diabetes, you might get it as well.
Besides this, environmental factors, like viruses or other autoimmune disorders like Vitiligo or Graves’ disease may also cause it.
You might get type 2 diabetes due to genetics, lifestyle disorders or certain health conditions. If you are obese or overweight and lead a lifestyle with a lot of stress and no physical activity or exercise, you might develop type 2 diabetes mellitus. High blood pressure, low levels of “good cholesterol” high-density lipoprotein (HDL), high levels of triglycerides in the blood, or a family history of diabetes might also increase your chances of getting diabetes.
Gestational diabetes is another factor. If you had gestational diabetes during your pregnancy, you are at a higher risk of having type 2 diabetes.
The symptoms of type 1 and type 2 diabetes include extreme thirst, excessive hunger, sudden weight loss, frequent urination, tiredness, frequent infections of skin, gums, vaginal or urinary tract, slow-healing sores and blurry vision.
Many people, however, can have type 2 diabetes without realising. This is because the symptoms can be mild, and don’t necessarily make you feel unwell.
If left untreated and uncontrolled, diabetes can lead to a range of problems. These problems can be caused gradually, so it’s important to get an early diagnosis where possible, and keep good control over your blood sugar levels.
Complications of untreated diabetes can include: cardiovascular disease, nerve, kidney and eye damage, skin conditions, Alzheimers and depression.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
Have something specific you want to know? Search our info below, or ask our experts a question if you can’t find what you’re looking for.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
Worldwide trends in diabetes since 1980: a pooled analysis of 751 population-based studies with 4·4 million participants. The Lancet, 387(10027), pp.1513–1530. (2016).
Gestational Diabetes. (2019).
Global trends in diabetes complications: a review of current evidence. Diabetologia, 62(1), pp.3–16. (2018).
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