How can you tell if you have diabetes? Most early symptoms are from higher-than-normal levels of glucose, a kind of sugar, in your blood.
The warning signs can be so mild that you don't notice them. That's especially true of type 2 diabetes. Some people don't find out they have it until they get problems from long-term damage caused by the disease.
With type 1 diabetes, the symptoms usually happen quickly, in a matter of days or a few weeks. They're much more severe, too.
Both types of diabetes have some of the same telltale warning signs.
Hunger and fatigue. Your body converts the food you eat into glucose that your cells use for energy. But your cells need insulin to bring the glucose in.
If your body doesn't make enough or any insulin, or if your cells resist the insulin your body makes, the glucose can't get into them and you have no energy. This can make you more hungry and tired than usual.
Peeing more often and being thirstier. The average person usually has to pee between four and seven times in 24 hours, but people with diabetes may go a lot more.
Why? Normally your body reabsorbs glucose as it passes through your kidneys. But when diabetes pushes your blood sugar up, your kidneys may not be able to bring it all back in. This causes the body to make more urine, and that takes fluids.
You'll have to go more often. You might pee out more, too. Because you're peeing so much, you can get very thirsty. When you drink more, you'll also pee more.
Dry mouth and itchy skin. Because your body is using fluids to make pee, there's less moisture for other things. You could get dehydrated, and your mouth may feel dry. Dry skin can make you itchy.
Blurred vision. Changing fluid levels in your body could make the lenses in your eyes swell up. They change shape and lose their ability to focus.
Other Type 2 Symptoms
These tend to show up after your glucose has been high for a long time.
- Between fingers and toes
- Under breasts
- In or around sex organs
Slow-healing sores or cuts. Over time, high blood sugar can affect your blood flow and cause nerve damage that makes it hard for your body to heal wounds.
Pain or numbness in your feet or legs. This is another result of nerve damage.
Other Type 1 Symptoms
Unplanned weight loss. If your body can't get energy from your food, it will start burning muscle and fat for energy instead. You may lose weight even though you haven't changed how you eat.
Nausea and vomiting. When your body resorts to burning fat, it makes “ketones.” These can build up in your blood to dangerous levels, a possibly life-threatening condition called diabetic ketoacidosis. Ketones can make you feel sick to your stomach.
When to Call Your Doctor
If you're older than 45 or have other risks for diabetes, it's important to get tested. When you spot the condition early, you can avoid nerve damage, heart trouble, and other complications.
As a general rule, call your doctor if you:
- Feel sick to your stomach, weak, and very thirsty
- Are peeing a lot
- Have a bad belly ache
- Are breathing more deeply and faster than normal
- Have sweet breath that smells like nail polish remover. (This is a sign of very high ketones.)