Diabetes Symptoms: When and How to Get Tested
Last updated September 10, 2026.
Diabetes develops when your body cannot manage blood sugar properly. Classic warning signs include urinating more than usual, constant thirst, blurred vision, slow healing cuts, and unexplained tiredness. If you notice these symptoms, a simple blood test at a lab, pharmacy, or community health center can confirm or rule out diabetes for $10 to $50, often free at screening events.
Common diabetes symptoms
Type 2 diabetes usually builds gradually. You may not feel sick at first. The most common signs are frequent urination, especially at night, and intense thirst that does not go away. Your kidneys work harder to flush excess sugar, pulling water from your tissues.
Other symptoms include blurred vision, tingling or numbness in your hands or feet, cuts or bruises that heal slowly, unexpected weight loss, and persistent fatigue. Not everyone has all these symptoms. Some people have none and learn they have diabetes during a routine checkup.
Type 1 diabetes symptoms appear suddenly, often in children and young adults, and include the same signs plus nausea, vomiting, and rapid breathing. Type 1 is less common and requires immediate medical attention.
When you should get tested
Get tested if you have any combination of the symptoms above, especially frequent urination and thirst that last more than a few days. Do not wait for symptoms to worsen.
You should also be screened if you are over 35, overweight, have a family history of diabetes, had gestational diabetes during pregnancy, or have high blood pressure or high cholesterol. The CDC recommends regular screening for adults 35 and older even without symptoms.
If you are younger than 35 and overweight with one or more risk factors, ask your doctor about early screening. Prediabetes and type 2 diabetes are now common in younger adults and teens.
Blood tests that diagnose diabetes
Two main tests diagnose diabetes. The A1C test measures your average blood sugar over the past two to three months. A result of 6.5 percent or higher on two separate tests means diabetes. A result between 5.7 and 6.4 percent indicates prediabetes. You do not need to fast before an A1C test.
The fasting plasma glucose test measures your blood sugar after you have not eaten for at least eight hours. A result of 126 mg/dL or higher on two separate tests means diabetes. A result between 100 and 125 mg/dL indicates prediabetes.
Both tests are reliable. A1C is more convenient because it does not require fasting. Some clinics also use a random plasma glucose test, which measures blood sugar at any time. A result of 200 mg/dL or higher with symptoms suggests diabetes.
Where to get tested and what it costs
Many pharmacies offer A1C or glucose testing without an appointment. Walgreens, CVS, and Walmart typically charge $10 to $30 for a fingerstick A1C test done in the store. Results are ready in minutes. Some pharmacies require you to buy a testing kit for home use instead.
National lab chains like Quest Diagnostics and LabCorp allow you to order tests online without a doctor's order in most states. An A1C test costs $30 to $50. You visit a lab location for a blood draw and receive results in one to three days.
Community health centers funded by HRSA offer diabetes testing on a sliding fee scale based on income. Many charge nothing for uninsured patients. Use the HRSA locator at findahealthcenter.hrsa.gov to find centers near you. Local health departments also run free or low cost screening events, especially in November during Diabetes Awareness Month.
What happens after a positive test
If your test shows diabetes or prediabetes, you will need follow-up care with a doctor or nurse practitioner. They will confirm the diagnosis with a second test if you only had one, check for complications, and start a treatment plan.
Treatment for type 2 diabetes usually begins with diet changes, weight loss if needed, and increased physical activity. Many people also need medication. Type 1 diabetes always requires insulin. Your doctor will refer you to a diabetes educator or dietitian.
Do not ignore a positive test result. Untreated diabetes damages blood vessels, nerves, kidneys, eyes, and heart over time. Early treatment prevents or delays these complications. If cost is a barrier, community health centers and county health departments can connect you with affordable ongoing care.
Emergency warning signs
Go to the emergency room or call 911 if you have extreme thirst, confusion, fruity smelling breath, rapid breathing, abdominal pain, or vomiting along with very high blood sugar. These symptoms indicate diabetic ketoacidosis, a life-threatening condition more common in type 1 diabetes.
Very low blood sugar, called hypoglycemia, also requires immediate help. Symptoms include shaking, sweating, fast heartbeat, dizziness, and confusion. If someone with diabetes becomes unconscious, call 911.
Common questions
Can I test myself for diabetes at home?
Yes. Over-the-counter A1C test kits sold at pharmacies cost $20 to $40 and give results in five to ten minutes using a fingerstick blood sample. However, a positive home test must be confirmed with a lab test. Home glucose meters measure daily blood sugar but cannot diagnose diabetes by themselves.
How long does it take to get diabetes test results?
Pharmacy fingerstick A1C tests return results in five to ten minutes. Lab-based A1C or fasting glucose tests ordered through Quest, LabCorp, or a doctor typically return results in one to three days. Some clinics provide same-day results if they run tests on site.
Do I need a doctor's order to get a diabetes test?
No. In most states you can order an A1C or glucose test directly from Quest, LabCorp, or national pharmacy chains without a prescription. Community health centers and county health departments also test walk-ins. If you have health insurance, check whether your plan covers testing without a referral to avoid surprise bills.
What is prediabetes and do I need treatment?
Prediabetes means your blood sugar is higher than normal but not yet in the diabetes range. An A1C between 5.7 and 6.4 percent indicates prediabetes. You can reverse it or prevent progression to diabetes through weight loss, healthier eating, and regular exercise. Your doctor may prescribe metformin if lifestyle changes alone do not lower your blood sugar within a few months.
How often should I be screened for diabetes if I have no symptoms?
The CDC recommends screening every three years starting at age 35 if your results are normal and you have no other risk factors. Screen more often if you are overweight, have high blood pressure, have a family history of diabetes, or had an earlier test showing prediabetes. Your doctor can adjust the schedule based on your individual risk.
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Pymander is not a replacement for a physician and does not provide medical advice, diagnosis, or treatment.