Symptoms
Before being diagnosed, many people with
type 2 diabetes develop symptoms such as increased
thirst and urination, weight loss, and blurred vision. However, others do not;
you may not have had symptoms if your blood sugar level increased slowly over
several years and your body adjusted to the rising level.
While diabetes is diagnosed when your
fasting blood glucose is 126
milligrams per deciliter (mg/dL) or higher, some
people do not notice symptoms until their blood sugar rises to 200 mg/dL or
higher.
If you did have symptoms, they will go away when your blood sugar
level returns to a
normal or near-normal range.
If your blood sugar level stays high, you may develop
symptoms of high blood sugar, such as increased
thirst, urination, and hunger, and blurred vision. You may not have symptoms of
high blood sugar if your blood sugar level is only slightly elevated. The
higher the level rises, the more likely you are to have symptoms. If you have
higher-than-normal blood sugar and do not drink enough liquids, you can become
dehydrated, which can lead to an emergency situation
called a
hyperosmolar state.
If your blood sugar is below a normal or near-normal range, you may
have symptoms of low blood sugar, ranging from sweating and
shakiness to confusion and loss of consciousness. These may occur as a side
effect of certain
oral medications for type 2 diabetes, such as
glyburide (DiaBeta), glipizide (Glucotrol), or glimepiride (Amaryl) or
insulin.
Symptoms and signs of complications
You may already have one or more complications of diabetes. Be
aware of possible complications and their symptoms, such as:
- Burning pain, numbness, or swelling in your
feet or hands, which may indicate
diabetic neuropathy. If one nerve is affected (focal
neuropathy), you may have symptoms in one area of your body, such as your eye
or face. Diabetic neuropathy can eventually affect your internal organs
(autonomic neuropathy) as well, causing abdominal problems, sexual problems,
and other kinds of symptoms. For more information, see the topic
Diabetic Neuropathy.
- Blurred or distorted vision; seeing
floaters or
flashes of light, large floating red or black spots,
or large areas that look like floating hair, cotton fibers, or spiderwebs; or
pain in your eyes. Although eye disease is not likely to cause symptoms in its
early stages, these symptoms may indicate
diabetic retinopathy.
- A wound that won't
heal or that looks infected, which may indicate damage to the blood vessels
that supply that area.
- A
heart attack,
stroke, or
peripheral arterial disease, which may indicate
macrovascular disease.
If you have kidney damage (diabetic
nephropathy), you may not notice symptoms. Early damage to your kidneys
can be detected only with urine tests for protein.