Type 2 Diabetes Is Rising in Younger Adults: Symptoms, Blood Tests and What to Do Next

Type 2 diabetes is often thought of as a condition that develops later in life. New research suggests that picture is changing.

A large English population study, reported by the BBC and published in The Lancet Regional Health – Europe, found that type 2 diabetes diagnoses are rising among adults under 40. Younger women were highlighted as a particularly important group within that increase.

The study analysed English National Diabetes Audit data from 2011 to 2024. It found a generational shift: type 2 diabetes incidence has been rising in younger adults, while falling in some older age groups. It also found that BMI at diagnosis has increased more quickly in younger adults than in older adults.

That does not mean every young adult needs urgent diabetes testing. It does mean younger adults should not assume type 2 diabetes is only something to think about in middle age.

If you have symptoms, risk factors, a family history, previous gestational diabetes, PCOS, weight-related health concerns or a previous raised blood-sugar result, it may be sensible to discuss diabetes risk with a GP.

At DocTap, diabetes blood tests are available as part of a GP-led pathway. That means the focus is not just taking a blood sample. It is choosing the right test, interpreting the result and deciding what should happen next.

Why this story matters

Type 2 diabetes develops when blood sugar becomes too high because insulin does not work properly, or the body does not produce enough of it.

Insulin is the hormone that helps move glucose from the blood into the body’s cells, where it can be used for energy. When insulin resistance develops, glucose can remain in the blood at higher levels. Over time, raised blood sugar can damage blood vessels and nerves.

When type 2 diabetes develops earlier in life, the implications can be different. A person diagnosed in their 20s or 30s may live with raised blood sugar for many decades. If diabetes is not identified or managed well, that can mean a longer period of risk for complications affecting the heart, kidneys, eyes, nerves and blood vessels.

For women, younger-onset type 2 diabetes can also matter for pregnancy planning and pregnancy outcomes. Previous gestational diabetes is itself an important risk factor for developing type 2 diabetes later.

The study should not be read as a reason to panic. It should be read as a reason to take risk seriously earlier.

The useful question is not:

Should every young adult have a diabetes test?

A better question is:

Do I have symptoms or risk factors that make checking my blood sugar sensible?

Why younger adults may miss the warning signs

One problem with type 2 diabetes is that it can develop gradually.

Some people have clear symptoms. Others feel only slightly different. Some have no obvious symptoms at all and only discover raised blood sugar through a blood test.

Younger adults may also dismiss symptoms because diabetes does not fit their idea of what a “young person’s health problem” looks like. Tiredness may be blamed on work. Thirst may be put down to exercise, warm weather or not drinking enough. Recurrent infections may be treated one by one without looking for a pattern.

That is why context matters.

A GP will not look at one symptom in isolation. They will consider symptoms, risk factors, previous results, weight, blood pressure, cholesterol, family history, ethnicity, medicines and overall health.

Symptoms that can be linked to raised blood sugar

Symptoms that can be associated with type 2 diabetes include:

• feeling unusually thirsty
• passing urine more often than usual, especially at night
• feeling very tired
• blurred vision
• recurrent thrush or infections
• cuts or wounds taking longer to heal
• unexplained weight loss

These symptoms do not automatically mean diabetes. They can have other causes.

For example, tiredness can be linked to poor sleep, stress, anaemia, thyroid problems, low mood, infection, medication effects or many other conditions. Passing urine more often can be linked to urinary infection, pregnancy, caffeine, fluid intake or bladder symptoms.

But persistent or unexplained symptoms should not be ignored. A blood test can help rule diabetes in or out as part of a wider assessment.

The NHS type 2 diabetes guide gives a useful overview of symptoms, diagnosis and treatment.

Who may be at higher risk?

Type 2 diabetes risk is not decided by one factor alone.

You may be more likely to develop type 2 diabetes if you have one or more of the following:

• living with overweight or obesity
• a family history of type 2 diabetes
• previous gestational diabetes
• polycystic ovary syndrome
• high blood pressure
• abnormal cholesterol
• previous raised glucose or HbA1c
• South Asian, Black African, Black Caribbean or other higher-risk ethnic background
• lower physical activity
• weight gain around the waist
• a history of cardiovascular or metabolic risk factors

Risk can also be affected by sleep, stress, medication, deprivation, food environment and access to support.

This matters because type 2 diabetes is sometimes discussed too simplistically. Weight is an important risk factor, but it is not the whole story. Some people develop type 2 diabetes at a lower BMI, while others may have obesity and never develop diabetes.

That is why testing and GP interpretation can be helpful. They turn a vague concern into a clearer clinical picture.

Why younger women are part of the current conversation

The new study has drawn attention to rising diagnoses among younger women.

There are several reasons this matters clinically. Younger women may have risk factors such as previous gestational diabetes or PCOS. Type 2 diabetes can also affect pregnancy planning, because raised blood sugar before and during pregnancy can carry risks for both mother and baby.

This does not mean every younger woman needs a diabetes blood test. It does mean symptoms and risk factors should be taken seriously, especially where there is a family history, previous gestational diabetes, PCOS, weight-related health concerns or previous abnormal blood results.

A GP can help decide whether testing is appropriate and whether HbA1c, glucose or a wider diabetic profile is the right option.

What blood tests check diabetes risk?

The most common blood tests used to assess diabetes risk are HbA1c and glucose.

They are related, but they do not answer exactly the same question.

HbA1c: the longer-term view

HbA1c reflects average blood sugar over roughly the previous two to three months.

That makes it useful because it is not just a snapshot of what your blood sugar happens to be at one moment. It can help identify whether blood sugar has been consistently raised over time.

HbA1c may be used to:

• assess diabetes risk
• identify raised blood sugar or prediabetes
• support diagnosis where clinically appropriate
• monitor known diabetes
• track whether changes are improving longer-term blood sugar control

An HbA1c result still needs interpretation. A GP may consider symptoms, medical history, previous results, pregnancy status, anaemia, kidney disease, medications and other factors that can affect interpretation.

Glucose: the point-in-time result

A glucose blood test shows blood sugar at the time of testing.

This can be useful, especially when interpreted alongside symptoms and HbA1c. But glucose can vary depending on when you last ate, whether you are fasting, recent illness, stress and other factors.

That is why glucose and HbA1c are often used differently. Glucose shows a more immediate picture. HbA1c shows a longer-term pattern.

Diabetic profiles: a broader picture

A diabetic profile can combine glucose and HbA1c, and in some cases additional markers such as urine microalbumin.

This can be useful because diabetes risk and diabetes monitoring are not only about blood sugar. A GP may also want to think about kidney health, blood pressure, cholesterol, weight and wider cardiovascular risk.

The right test depends on the clinical question. Someone checking risk for the first time may need a different approach from someone monitoring known diabetes or reviewing previous abnormal results.

Diabetes blood tests at DocTap

DocTap offers diabetes blood tests including HbA1c, glucose and diabetic profiles.

The pathway is GP-led. Patients book a GP blood-test appointment, see a doctor, discuss symptoms or risk factors, have the sample taken during the appointment, and receive results with a doctor’s report securely in their DocTap account.

DocTap’s diabetes testing service includes:

HbA1c

HbA1c reflects average blood sugar over roughly the previous two to three months.

DocTap offers HbA1c testing with same-day results by 10pm at selected clinics. A venous HbA1c option is available across all clinics, with results typically available in 2 days.

Glucose

Glucose shows blood sugar at the time of testing.

DocTap offers glucose testing across all clinics, with results typically available in 2 days.

Diabetic Profile 1

Diabetic Profile 1 includes glucose and HbA1c.

DocTap offers Diabetic Profile 1 across all clinics, with results typically available in 2 days.

Diabetic Profile 2

Diabetic Profile 2 includes glucose, HbA1c and microalbumin.

DocTap offers Diabetic Profile 2 across all clinics, with results typically available in 3 working days.

Turnaround times can vary if a sample needs additional checks. Your GP can advise which test is most appropriate during your appointment.

What happens during a GP blood-test appointment?

A diabetes blood test is most useful when it starts with the right question.

During a GP blood-test appointment, the doctor may ask about:

• symptoms such as thirst, tiredness, weight change or frequent urination
• family history of diabetes
• previous glucose or HbA1c results
• previous gestational diabetes
• PCOS
• weight and waist-related concerns
• blood pressure or cholesterol
• current medicines
• pregnancy or pregnancy planning
• lifestyle factors such as activity, alcohol, sleep and diet
• whether you have known diabetes or are checking risk for the first time

This helps the GP decide whether HbA1c alone is enough, whether glucose should be added, or whether a broader profile is more useful.

It also helps avoid two common problems: ordering tests that do not answer the real question, or receiving a result without knowing what to do with it.

Why GP interpretation matters

A blood test result is not the same thing as a diagnosis, and it is not the same thing as a plan.

For example, a raised HbA1c may suggest increased diabetes risk, prediabetes or diabetes-range blood sugar. But your GP may still need to consider whether the result should be repeated, whether there are factors that affect interpretation, and what other risks are present.

A normal result can also need context. If symptoms are ongoing, your GP may consider other explanations rather than simply saying “the diabetes test is normal”.

This is where GP interpretation matters.

A doctor can help answer:

• Is this result normal, borderline or raised?
• Does it fit with my symptoms?
• Does it need repeating?
• Should I check cholesterol, kidney function or other markers?
• Do I need lifestyle advice, treatment discussion or follow-up?
• Should I see my NHS GP for ongoing diabetes care?
• Is weight management relevant to my risk profile?
• Are there other causes for my symptoms?

DocTap results and the doctor’s report are available securely in the patient account. Abnormal results are prioritised, and urgent action is escalated by the clinician where needed.

What if your HbA1c is normal?

A normal HbA1c can be reassuring, but it does not automatically explain symptoms.

If you have been feeling unusually tired, thirsty or unwell, your GP may consider other causes. These might include anaemia, thyroid disease, infection, vitamin deficiency, kidney or liver issues, stress, sleep problems or medication effects.

The next step depends on the clinical picture.

For some people, no further testing may be needed. For others, a wider set of private blood tests or a follow-up GP appointment may be appropriate.

What if your result is raised?

If a blood test shows raised blood sugar, the next step is not panic. It is a structured plan.

Depending on the result and your symptoms, your GP may discuss:

• whether the result needs repeating
• whether it suggests raised diabetes risk, prediabetes or diabetes
• weight and waist measurement
• blood pressure
• cholesterol
• diet, activity, sleep and alcohol
• family history and ethnicity
• whether further blood or urine tests are needed
• whether medication or NHS follow-up should be discussed
• whether weight-management support may help

A raised result does not mean you have failed. It means there is information to act on.

For many people, earlier action can make a meaningful difference.

What is prediabetes?

Prediabetes is a term often used when blood sugar is higher than normal but not in the diabetes range.

It is not always a formal diagnosis in the same way as type 2 diabetes, and the terminology can vary. But clinically, it can be useful because it identifies a group of people whose blood sugar is already moving in the wrong direction.

Prediabetes does not mean type 2 diabetes is inevitable.

It does mean it is worth taking action. This may include weight management, dietary changes, physical activity, sleep, alcohol reduction, blood pressure control, cholesterol review and repeat testing.

A GP can help turn “your blood sugar is raised” into a practical plan.

Type 1 or type 2: why younger age can make assessment important

Most diabetes in adults is type 2 diabetes, but younger adults can develop different forms of diabetes, including type 1 diabetes.

This matters because symptoms such as thirst, passing urine frequently, weight loss and tiredness can occur in more than one type of diabetes.

If symptoms are sudden, severe or associated with feeling very unwell, urgent medical assessment may be needed. A routine private blood-test appointment is not the right route for someone who is acutely unwell.

For non-emergency symptoms or risk checking, a GP can help decide what testing is appropriate and whether onward care is needed.

What treatment might involve if type 2 diabetes is diagnosed

If type 2 diabetes is diagnosed, treatment is usually about more than lowering one blood-test number.

A clinician may discuss:

• diet and physical activity
• weight management where relevant
• blood pressure
• cholesterol
• smoking and alcohol
• kidney checks
• eye screening
• foot health
• medication where clinically appropriate
• follow-up blood tests
• longer-term monitoring

Some people can improve blood sugar significantly with lifestyle and weight changes. Others need medication. Many need a combination of approaches over time.

The right plan depends on the person, the result, symptoms, other health conditions and long-term risk.

A private GP can help interpret results and discuss next steps. If diabetes is diagnosed or strongly suspected, ongoing care is often best coordinated with the patient’s NHS GP or a diabetes service so that monitoring, prescriptions, annual reviews and complication screening are joined up.

Why weight matters, but should not be used to shame people

The new study links rising type 2 diabetes in younger adults with increasing BMI at diagnosis. That is clinically important, but it needs careful language.

Obesity is a major risk factor for type 2 diabetes, but it is not a moral failing.

Modern food environments, work patterns, stress, sleep, genetics, mental health, medication, hormones, pregnancy history and access to support can all influence weight.

For patients, the useful question is not:

Who is to blame?

It is:

What is my current risk, and what support would actually help reduce it?

For some people, that may mean lifestyle changes. For others, it may include structured weight-management support. For some eligible patients, medical weight-loss treatment may be appropriate as part of a clinically supervised plan.

Where weight management may fit

Weight management should not be the whole article, but it is relevant.

If weight is part of someone’s diabetes-risk profile, GP-led weight management may be discussed where clinically appropriate.

At DocTap, medical weight loss is GP-led. A doctor reviews suitability, medical history, current medicines and safety before deciding whether treatment may be appropriate.

This is especially important for patients who may already have raised blood sugar, high blood pressure, abnormal cholesterol, PCOS, previous gestational diabetes or other metabolic risk factors.

The aim is not simply weight loss. The aim is safer, clinically supported risk reduction.

Medical weight-loss treatment is not suitable for everyone, and it should not be treated as a shortcut. It should be part of a wider clinical discussion.

When should you consider a diabetes blood test?

A diabetes blood test may be worth discussing with a GP if you have symptoms of raised blood sugar or risk factors for type 2 diabetes.

It may be particularly worth considering if you:

• have persistent thirst, tiredness or frequent urination
• have a family history of type 2 diabetes
• have weight-related health concerns
• have PCOS
• have had gestational diabetes
• have high blood pressure
• have abnormal cholesterol
• have previously had a raised glucose or HbA1c result
• are starting a structured weight-management plan
• want to understand your metabolic risk more clearly
• have symptoms that have not been explained by other causes

Testing can be useful, but testing alone is not the whole answer.

The important part is what happens next: interpretation, advice and follow-up.

How DocTap can help

DocTap can support patients who want to understand diabetes risk, investigate symptoms or review weight-related health concerns.

DocTap offers:

• diabetes blood tests, including HbA1c, glucose and diabetic profile options
• broader private blood tests
• health screens that can assess wider metabolic risk
• private GP services for symptoms, results and next steps
• GP-led medical weight loss where clinically appropriate

A GP can help decide which tests are relevant, explain the result and advise on the next step.

That is important because diabetes risk is rarely about one number alone.

The takeaway

The rise in type 2 diabetes among younger adults is a reminder that diabetes risk does not begin at 50 or 60.

Younger adults with symptoms or risk factors should not ignore the possibility of raised blood sugar. A blood test such as HbA1c or glucose may help identify risk earlier, and a GP can help interpret the result properly.

Weight can be part of the picture, but the response should be clinical and supportive, not judgmental.

For some patients, GP-led weight management may form part of a wider plan to reduce risk. For others, the next step may be repeat testing, lifestyle support, treatment discussion or ongoing monitoring.

If you are worried about symptoms, family history, weight-related risk or a previous raised result, a GP appointment and appropriate blood tests can be a sensible place to start.

Concerned about diabetes risk or weight-related health? Book a GP blood-test appointment with DocTap to discuss symptoms, diabetes testing or whether GP-led weight-management support may be suitable.