# What blood sugar level is considered low? Canonical page: https://clinicsjo.com/en/faq/what-blood-sugar-level-is-considered-low Language: en Category: diabetes Publisher: ClinicsJo Published: 2026-09-13T08:09:52.166Z Content updated: 2026-09-13T08:09:52.166Z Translation (ar): https://clinicsjo.com/ar/faq/what-blood-sugar-level-is-considered-low Hypoglycemia is defined as a medical condition that occurs when glucose levels in the bloodstream drop below what the body needs to function normally. The definition of a "low level" varies based on a person's health status and whether or not they have diabetes [\[1\]](). For many individuals with diabetes, a blood sugar level below 70 milligrams per deciliter (mg/dL) is considered an indicator of a low that requires intervention. However, exact numbers may vary based on the advice of your medical team, as each patient has their own target range [\[2\]](). For people without diabetes, a blood sugar level below 55 mg/dL is usually considered low; this is less common but may occur due to other medical conditions or side effects of certain medications [\[1\]](). ## Signs and symptoms of low blood sugar Symptoms of low blood sugar often appear suddenly and rapidly. These symptoms range from initial signs to severe indications of central nervous system impairment. Common symptoms include: feeling shaky or nervous, intense hunger, excessive sweating, rapid heartbeat, feeling dizzy, confusion, and difficulty concentrating or speaking clearly [\[2\]]() [\[3\]](). In cases of severe hypoglycemia, a person may lose consciousness or experience seizures, which makes this an emergency situation requiring immediate assistance [\[2\]](). ## Causes of low blood sugar The most common causes of hypoglycemia are related to the use of certain diabetes medications, such as insulin or sulfonylureas, which work to stimulate the pancreas to increase insulin secretion [\[2\]](). Low blood sugar can also occur due to lifestyle factors such as skipping meals or reducing carbohydrate intake below the required amount, performing strenuous, unaccustomed physical activity without making dietary adjustments, as well as drinking alcohol or having an illness that prevents eating normally [\[1\]]() [\[2\]](). ## First aid and prevention If you feel symptoms of low blood sugar, ensure you check your level using a blood glucose monitor if possible. If the reading is below 70 mg/dL, the 15-15 rule should be applied: consume 15 to 20 grams of fast-acting carbohydrates (such as half a cup of fruit juice or regular soda, or a tablespoon of sugar or honey), then wait 15 minutes and recheck your blood sugar [\[2\]](). If the level remains low, repeat the process. For prevention, it is recommended to adhere to your meal plan, monitor physical activity, and use Continuous Glucose Monitoring (CGM) systems that alert you as soon as the level drops below the allowed range [\[2\]](). For more details, you can view our comprehensive guide on [Hypoglycemia: Warning Signs, First Aid, and Prevention (Arabic)](). ## When does the situation require emergency intervention? If hypoglycemia reaches a severe stage that prevents the affected person from treating themselves, or in cases of loss of consciousness, companions must call emergency services immediately. Glucagon is considered the optimal treatment for severe cases and should be available to patients at risk of such episodes via prescription, with the necessity of teaching those close to the patient how to use it correctly [\[1\]]() [\[2\]](). ## Medical references - [Hypoglycemia]() - [Low Blood Glucose (Hypoglycemia)]() - [Blood Glucose Test]() General health education; not a substitute for individualized clinical assessment. Citation URL: https://clinicsjo.com/en/faq/what-blood-sugar-level-is-considered-low#answer