Diabetes Symptoms and Blood Sugar Levels, A Practical Guide
Thirst, frequent urination, tiredness and slow-healing wounds are the classic signs, but type 2 diabetes often develops silently for years. Here are the symptoms, the numbers, and what they mean.
The classic symptoms of diabetes are passing urine frequently, unusual thirst, tiredness, unexplained weight loss and blurred vision. But the most important fact about type 2 diabetes is that it frequently produces no symptoms at all for years, which is why a large share of people living with it in Kenya have never been diagnosed.
This guide covers the symptoms to look for, what blood sugar numbers actually mean, and when a reading warrants a doctor.
Symptoms to look out for
Passing urine frequently, particularly waking at night to do so. When blood sugar is high, the kidneys pull water out to flush the excess glucose.
Unusual thirst. A direct consequence of the above. People often describe drinking constantly without feeling satisfied.
Tiredness that rest does not fix. Glucose is not getting into the cells that need it.
Unexplained weight loss. More typical of type 1, but it happens in type 2 as well. Losing weight without trying is always worth investigating.
Blurred vision. High glucose changes the fluid balance in the lens of the eye. It often improves once blood sugar is controlled.
Slow-healing wounds. Cuts, sores and ulcers that take far longer than they should, especially on the feet.
Recurrent infections, skin infections, thrush, urinary infections that keep returning.
Tingling or numbness in the hands or feet, from nerve damage that develops over time.
If several of these are present together, get tested rather than waiting to see whether they pass.
Blood sugar levels chart
Readings in Kenya are usually given in mmol/L.
| Category | Fasting (8+ hours no food) | Random (any time) |
|---|---|---|
| Normal | 4.0 – 5.5 mmol/L | Below 7.8 mmol/L |
| Raised (prediabetes) | 5.6 – 6.9 mmol/L | 7.8 – 11.0 mmol/L |
| Diabetes range | 7.0 mmol/L or above | 11.1 mmol/L or above |
Two important qualifications. First, a single reading is not a diagnosis. Diagnosis requires confirmation, usually a repeat test on a different day or an HbA1c laboratory test showing your average glucose over roughly three months. Second, thresholds are general guidance; your doctor may set different personal targets, particularly if you are pregnant, elderly, or already on treatment.
Fasting versus random testing
A fasting test is taken after about eight hours without food, realistically, first thing in the morning before breakfast. It is the more informative screening measurement because it shows what your body does at rest.
A random test is taken at any time. It is less precise for screening, but a clearly high random reading is meaningful on its own, and it is entirely worth doing if you have symptoms and cannot easily come in fasting.
Prediabetes, the stage that matters most
A fasting reading of 5.6 to 6.9 mmol/L sits between normal and diabetes. It is often called prediabetes, and it is the single most useful thing a screening test can find.
At this stage the trajectory is still very changeable. Losing modest weight, reducing sugar and refined starch, and walking regularly can bring readings back into the normal range and delay or prevent type 2 diabetes altogether. The people who benefit most from testing are precisely those who feel completely fine.
Type 1 and type 2
Type 1 occurs when the body produces little or no insulin. It usually appears in childhood or early adulthood, develops over weeks rather than years, and always requires insulin treatment. It is not caused by diet or lifestyle.
Type 2 occurs when the body still produces insulin but responds poorly to it. It is far more common, develops gradually, and is strongly associated with excess weight, inactivity and diet , though family history and age also matter considerably.
Gestational diabetes develops during pregnancy and usually resolves after birth, but it raises the later risk of type 2 for both mother and child, and warrants follow-up testing.
Who should get tested
It is worth checking your blood sugar if you:
- have a parent or sibling with diabetes
- are over 40
- carry extra weight, particularly around the abdomen
- have high blood pressure
- had gestational diabetes, or a baby over about 4kg
- are physically inactive
- have any of the symptoms listed above
Type 2 diabetes is increasing across Kenya, and the rise is sharpest in urban and peri-urban areas as diets shift toward refined foods and sugary drinks. Nyamasaria is not exempt from that.
When high blood sugar is an emergency
Seek urgent medical care for:
- vomiting that will not stop
- deep, rapid breathing
- breath that smells sweet or fruity
- severe abdominal pain
- confusion or drowsiness
- rapid heartbeat with dehydration
These can indicate diabetic ketoacidosis, a serious complication requiring hospital treatment.
Low blood sugar matters too, particularly for anyone already on diabetes treatment. Shakiness, sweating, confusion, irritability, a pounding heart and sudden intense hunger can indicate hypoglycaemia. Take fast-acting sugar, glucose, juice, sweets, immediately. If the person is unconscious or unable to swallow, do not put anything in their mouth; get emergency help.
Living with a diagnosis
Diabetes is manageable, and people manage it well for decades. What that takes:
Consistency with medication. Take it as prescribed, every day. Blood sugar that is controlled feels exactly the same as blood sugar that is not, which is why people drift.
Regular monitoring. Keep a written record. A pattern over weeks tells your doctor far more than one reading on the day of your appointment.
Diet. Smaller portions of ugali, rice and chapati; fewer sugary drinks; more vegetables and beans. This is not about eliminating foods you grew up with, it is about quantity and balance.
Movement. Regular walking improves how your body handles glucose, independently of weight loss.
Foot care. Check your feet daily. Reduced sensation means an injury can go unnoticed until it is serious, and foot complications are among the most preventable causes of harm in diabetes.
Regular eye checks. Diabetic eye disease develops without symptoms until vision is already affected.
Why type 2 diabetes is rising in Kenya
The increase is not mysterious. It tracks a set of changes that have happened rapidly across Kenyan towns over the last generation.
Diets have shifted toward refined carbohydrates, cooking oil and sugar, and away from the more varied traditional diet. Sugary drinks in particular have become an everyday purchase rather than an occasional treat, and a single bottle can contain more sugar than a person needs in a day.
Physical activity has fallen as more work becomes sedentary and more journeys are made by matatu or boda rather than on foot. And urban living brings longer working hours, more processed convenience food and less time to cook.
None of this is a reason for guilt, and it is not simply a matter of individual willpower. But it does mean that the risk applies to far more people than it did twenty years ago, including people who feel entirely well and have no family history.
Diabetes and blood pressure together
The two travel together far more often than chance would explain. Many people with type 2 diabetes also have raised blood pressure, and having both multiplies the risk to the heart, kidneys and eyes rather than simply adding to it.
If you have been diagnosed with one, it is worth having the other checked regularly. That is part of why we offer both at the counter, and why the blood pressure check is free, someone who has come in for a glucose reading should not have to make a second decision to get the other.
What to bring to a doctor
If a counter test suggests you should see a doctor, take these with you: your reading and the date, whether you had eaten beforehand, any family history of diabetes, a list of every medicine you take, and any symptoms with roughly when they started.
Arriving with that information turns a vague appointment into a useful one, and it often saves a repeat visit.
Testing is not the same as diagnosing
It is worth restating plainly, because it is the point people most often misunderstand about pharmacy testing.
A finger-prick reading is a screening measurement taken at one moment. It tells you whether your blood sugar is in a normal range right now. It cannot tell you which type of diabetes you have, how long you have had it, or what your average has been over recent months. Only a doctor, usually with an HbA1c laboratory test, can establish that.
What a counter test is genuinely good at is answering one question cheaply and quickly: is this worth taking further? For most people the answer is reassuring. For some it is the prompt that leads to a diagnosis years earlier than it would otherwise have come, which is when it is most treatable.
Get your blood sugar checked in Kisumu
Chetu Chemist in Nyamasaria offers blood sugar testing at the counter. A finger prick, a reading in seconds, and a pharmacist who will explain what the number means and tell you honestly whether you need to see a doctor.
We will not diagnose you, that is a doctor’s job, and any chemist claiming otherwise should worry you. What we will do is give you a number and help you understand it.
Walk in, or call 0792 855 271.
Frequently asked
What are the early symptoms of diabetes?
The most common early signs are passing urine frequently, especially at night, unusual thirst, tiredness, unexplained weight loss, blurred vision, wounds that heal slowly and recurrent infections. Many people with type 2 diabetes have no symptoms at all for years.
What are normal blood sugar levels?
For most adults, a fasting reading between about 4.0 and 5.5 mmol/L is normal. From 5.6 to 6.9 mmol/L fasting is raised, sometimes called prediabetes. A fasting reading of 7.0 mmol/L or above, confirmed on more than one occasion, is the usual threshold for diagnosing diabetes.
Can a chemist diagnose diabetes?
No. A finger-prick test at a pharmacy counter is a screening tool, not a diagnosis. Diagnosis requires a doctor, usually with a repeat test or an HbA1c laboratory test. What a counter test does is tell you whether that doctor's visit is needed now.
What is the difference between type 1 and type 2 diabetes?
In type 1, the body produces little or no insulin, it usually appears in childhood or early adulthood, and it always requires insulin treatment. In type 2, the body still makes insulin but responds poorly to it. Type 2 is far more common, develops gradually, and is strongly linked to weight, diet and activity.
When is high blood sugar an emergency?
Seek urgent care for vomiting that will not stop, deep or rapid breathing, breath with a fruity smell, severe abdominal pain, confusion or drowsiness. These can indicate diabetic ketoacidosis, which is a medical emergency.