What  is Diabetes mellitus?

Diabetes mellitus is a condition in which the amount of glucose (sugar) in the blood is too high because the body cannot use it properly. Glucose comes from the digestion of starchy foods such as bread, rice, potatoes, chapatis, yams and plantain, from sugar and other sweet foods, and from the liver which makes glucose.Insulin is vital for life. It is a hormone produced by the pancreas, that helps the glucose to enter the cells where it is used as fuel by the body. The main symptoms of untreated diabetes are increased thirst, going to the loo all the time – especially at night, extreme tiredness, weight loss, genital itching or regular episodes of thrush, and blurred vision.

There are two main types of diabetes. These are:

Type 1 diabetes, also known as insulin dependent diabetes

Type 2 diabetes, also known as non insulin dependent diabetes

Type 1 diabetes develops if the body is unable to produce any insulin. This type of diabetes usually appears before the age of 40. It is treated by insulin injections and diet and regular exercise is recommended.

Type 2 diabetes develops when the body can still make some insulin, but not enough, or when the insulin that is produced does not work properly (known as insulin resistance). This type of diabetes usually appears in people over the age of 40, though often appears before the age of 40 in South Asian and African-Caribbean people. It is treated by diet and exercise alone or by diet, exercise and tablets or by diet, exercise and insulin injections.

The main aim of treatment of both types of diabetes is to achieve blood glucose and blood pressure levels as near to normal as possible. This, together with a healthy lifestyle, will help to improve wellbeing and protect against long-term damage to the eyes, kidneys, nerves, heart and major arterie

  • The main symptoms of diabetes are:

    increased thirst
    going to the loo all the time – especially at night
    extreme tiredness
    weight loss
    genital itching or regular episodes of thrush
    blurred vision.

Type 2 diabetes develops slowly and the symptoms are usually less severe. Some people may not notice any symptoms at all and their diabetes is only picked up in a routine medical check up. Some people may put the symptoms down to 'getting older' or 'overwork'.

Type 1 diabetes develops much more quickly, usually over a few weeks, and symptoms are normally very obvious.

In both types of diabetes, the symptoms are quickly relieved once the diabetes is treated. Early treatment will also reduce the chances of developing serious health problems.

Diabetes is a common health condition. About 1.4 million people in the UK are known to have diabetes — that’s about three in every 100 people. And there are an estimated one million people in the UK who have diabetes but don't know it. Over three-quarters of people with diabetes have Type 2 diabetes.

Although the condition can occur at any age, it is rare in infants and becomes more common as people get older.

Type 1 diabetes
Type 1 diabetes develops when the insulin-producing cells in the pancreas have been destroyed. Nobody knows for sure why these cells have been damaged but the most likely cause is an abnormal reaction of the body to the cells. This may be triggered by a viral or other infection. This type of diabetes generally affects younger people. Both sexes are affected equally.

Type 2 diabetes
Type 2 diabetes used to be called 'maturity onset' diabetes because it usually appears in middle-aged or elderly people, although it does occasionally appear in younger people. The main causes are that the body no longer responds normally to its own insulin, and/or that the body does not produce enough insulin.

People who are overweight are particularly likely to develop Type 2 diabetes. It tends to run in families and is more common in Asian and African-Caribbean communities. Some people wrongly describe Type 2 diabetes as 'mild' diabetes. There is no such thing as mild diabetes. All diabetes should be taken seriously and treated properly

People with diabetes have a higher chance of developing certain serious health problems, including heart disease, stroke, high blood pressure, circulation problems, nerve damage, and damage to the kidneys and eyes. The risk is particularly high for people with diabetes who are also very overweight, who smoke or who are not physically active.

You will greatly reduce your risk of developing any of these complications by controlling your blood glucose and blood pressure levels, and by eating healthily and doing regular physical activity.

Regular medical check-ups
In the last 10 to 20 years, the care for people with diabetes has improved dramatically. One of the most important developments has been improved methods of screening which will help your doctor to pick up any health problems at an early stage so they can be treated more successfully.

This is why having regular medical check-ups, at least annually, is so important.

If you have diabetes, you will have to make some changes to your way of life. However, by sticking to your treatment, monitoring your condition and following a generally healthy lifestyle, you should be able to continue your normal, day-to-day life and take part in the activities you have always enjoyed.

Healthy eating
You may need to change your eating habits.

If you smoke – quit now
Smoking is particularly dangerous for people with diabetes as it greatly increases the chance of developing a serious health problem. If you smoke, it is very important that you quit now.

Physical activity
It is a good idea to take up some form of regular physical activity, such as walking, swimming, dancing or cycling. Consult your doctor or diabetes nurse before taking up any regular exercise, particularly if you are overweight.

Following your treatment plan
It is very important that you follow the treatment that your doctor or diabetes nurse has advised. You will feel much better if you keep your blood glucose levels as near normal as possible. Blood glucose levels are measured in millimols per litre of blood. This is shortened to mmol/l. You should aim for a level of 4 - 7 mmol/l before meals, rising to no higher than 10 mmol/l two hours after meals. Your doctor or diabetes nurse will advise you on what is best for you. They can also advise you on the many gadgets available that can help you to monitor your blood glucose levels.