Symptoms of low blood sugar, such as sweating, shakiness, extreme hunger, nausea, or dizziness. Symptoms of high blood sugar, such as increased thirst, increased urination, fatigue, or lightheadedness. Symptoms occur more often or are more severe.
Symptoms of high blood sugar
feeling very thirsty. peeing a lot. feeling weak or tired. blurred vision.
Symptoms of low blood sugar and high blood sugar are different. With hypoglycemia, people can feel shaky, sweaty, and dizzy; but, with hyperglycemia, people often don't experience any symptoms. Recognizing the symptoms of hypoglycemia — and knowing how to treat it — is important when you have diabetes.
Extreme thirst. Light-headedness. Flushed, hot, dry skin. Restlessness, drowsiness, or difficulty waking up.
In general: Below 5.7% is normal. Between 5.7% and 6.4% is diagnosed as prediabetes. 6.5% or higher on two separate tests indicates diabetes.
When your blood sugar level gets too high, the quickest way to reduce it is to take fast-acting insulin. Exercising is another fast, effective way to lower blood sugar. In some cases, you should go to the hospital. High blood sugar levels are known as hyperglycemia or high blood glucose.
Both low and high blood-sugar levels lead to serious health consequences. High blood sugar may cause nausea, vomiting, or shortness of breath, while low blood sugar may cause confusion, dizziness, blurred vision, seizures, unconsciousness, or even death, McDermott explains.
Normal Results
If you had a fasting blood glucose test, a level between 70 and 100 mg/dL (3.9 and 5.6 mmol/L) is considered normal. If you had a random blood glucose test, a normal result depends on when you last ate. Most of the time, the blood glucose level will be 125 mg/dL (6.9 mmol/L) or lower.
Less than 140 mg/dL (7.8 mmol/L ) is normal. 140 to 199 mg/dL (7.8 mmol/L and 11.0 mmol/L ) is diagnosed as prediabetes. 200 mg/dL (11.1 mmol/L ) or higher after two hours suggests diabetes.
Coffee—even without sweetener. Some people's blood sugar is extra-sensitive to caffeine. Losing sleep—even just one night of too little sleep can make your body use insulin less well. Skipping breakfast—going without that morning meal can increase blood sugar after both lunch and dinner.
your body releasing too much insulin after eating (called reactive hypoglycaemia or postprandial hypoglycaemia) not eating (fasting) or malnutrition. a complication of pregnancy. a gastric bypass (a type of weight loss surgery)
Drinking water regularly may rehydrate the blood, lower blood sugar levels, and reduce diabetes risk ( 20 , 21 ). Keep in mind that water and other zero-calorie drinks are best. Avoid sugar-sweetened options, as these can raise blood glucose, drive weight gain, and increase diabetes risk ( 22 , 23 ).
You can check your blood sugar level without the need for finger sticks or needles by using a CGM or flash monitor. There are several on the market. These devices involve a sensor that measures the level of sugar in the interstitial fluid, which is a proxy for the amount of sugar in your blood.
For most people without diabetes, normal blood sugar levels are: between 4 and to 6 mmol/L before meals.
From 90 to 130 mg/dL (5.0 to 7.2 mmol/L) for adults. From 90 to 130 mg/dL (5.0 to 7.2 mmol/L) for children, 13 to 19 years old. From 90 to 180 mg/dL (5.0 to 10.0 mmol/L) for children, 6 to 12 years old. From 100 to 180 mg/dL (5.5 to 10.0 mmol/L) for children under 6 years old.
What Is Prediabetes? Prediabetes is a serious health condition where blood sugar levels are higher than normal, but not high enough yet to be diagnosed as type 2 diabetes. Approximately 96 million American adults—more than 1 in 3—have prediabetes. Of those with prediabetes, more than 80% don't know they have it.
What should your blood sugar be when you wake up? Whenever possible, aim to keep your glucose levels in range between 70 and 130 mg/dL in the morning before you eat breakfast, and between 70 and 180 mg/dL at other times.
What is Low Blood Sugar? Low blood sugar is called hypoglycemia. A blood sugar level below 70 mg/dL (3.9 mmol/L) is low and can harm you. A blood sugar level below 54 mg/dL (3.0 mmol/L) is a cause for immediate action.
Feeling shaky after eating may be a sign of idiopathic postprandial syndrome, along with other symptoms like chills, sweating, and lightheadedness. It might also be a symptom of postprandial reactive hypoglycemia, which occurs when you experience low blood sugar levels 2 to 5 hours after eating.