Hypoglycemia Quiz
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Loss of appetite
Sudden sweating
Have a headache
Brain fog
Fatigued
Becoming listless and unenergetic
Blacking out
Not seeing your symptoms? No worries!
What is Hypoglycemia?
Low blood sugar levels. This can be fatal as the brain depends on sugar for energy. It is usually caused by diabetes medications, but can also be caused by hormone disorders and insulin overproduction.
Typical Symptoms of Hypoglycemia
- Taking insulin or other diabetic drugs
- Symptoms improve with meals
- Seizure
- Fine tremors of the hands or fingers
- Difficulty speaking, performing tasks, or recognizing things
- History of stomach surgery
- Cold sweat
- Heart pounding
Diagnostic Questions for Hypoglycemia
Your doctor may ask these questions to check for this disease:
- Are you taking diabetic medications?
- Does eating improve your symptoms?
- Have you experienced any seizures?
- Do you experience fine tremors in your hands or fingers?
- Have you been experiencing difficulty speaking, performing tasks, or recognizing things?
Treatment of Hypoglycemia
This condition is first managed by consuming sugar quickly - options include candy, honey, table sugar, or sweet drinks. In severe cases where a patient is unconscious, a sugar-containing drip can be given via a needle in the vein. It is important to find the reason for low blood sugar, to prevent it from happening again.
Reviewed By:
Maxwell J. Nanes, DO (Emergency Medicine)
Dr Nanes received a doctorate from the Chicago College of Osteopathic Medicine and went on to complete a residency in emergency medicine at the Medical College of Wisconsin. There he trained at Froedtert Hospital and Children's Hospital of Wisconsin in the practice of adult and pediatric emergency medicine. He was a chief resident and received numerous awards for teaching excellence during his time there. | | After residency he took a job at a community hospital where he and his colleagues worked through the toughest days of the COVID-19 pandemic. |
Hidetaka Hamasaki, MD (Endocrinology)
Dr. Hamasaki graduated from the Hiroshima University School of Medicine and the Graduate School of Medicine, Jichi Medical University. He completed his residency at the Department of Diabetes, Endocrinology and Metabolism, National Center for Global Health and Medicine Hospital and the Department of Internal Medicine, Kohnodai Hospital, National Center for Global Health and Medicine. He has served in the National Center for Global Health and Medicine Hospital and Kohnodai Hospital and joined Hamasaki Clinic in April 2017. Dr. Hamasaki specializes in diabetes and treats a wide range of internal medicine and endocrine disorders.
Content updated on Dec 5, 2025
Following the Medical Content Editorial Policy
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People with similar symptoms also use Ubie's symptom checker to find possible causes
- My body is jerking
- Shaking hands
- Antisocial behavior and language difficulty
- Twitching
- Hand twitching
- Fever seizures (with fever of >100.4°F / 38°C)
- Can't say what I want to say
- Losing grip in hands and dropping things
- Seizures without fever
- Problems remembering
- The first seizure
- Hands shaking after workout
- Repetitive seizures
- Speech is difficult and requires conscious effort
- Hand muscle spasms
See full list
Symptoms Related to Hypoglycemia
Diseases Related to Hypoglycemia
FAQs
Q.
Feeling Shaky? Why Your Low Blood Sugar Is Crashing & Expert Next Steps
A.
Shakiness, sweating, hunger, dizziness, or confusion can signal low blood sugar caused by too much insulin, missed or delayed meals, alcohol, extra exercise, or reactive hypoglycemia; treat fast with the 15-15 rule using 15 grams of quick carbs, recheck in 15 minutes, then eat a small protein and carb snack. There are several factors to consider, including underlying conditions, prevention tips for people with and without diabetes, and when to seek urgent care for severe or recurrent episodes; see below for complete guidance and red flags that could change your next steps.
References:
* Cryer PE, Axelrod L, Grossman AB, Heller BM, Kennedy L, Santiago JV, Tamborlane WV. Hypoglycemia in diabetes. Diabetes Care. 2009 Oct;32(10):1930-7. doi: 10.2337/dc09-9940. PMID: 19783776; PMCID: PMC2752697.
* Desouza C, Fonseca V. Hypoglycemia in diabetes: An update on management. Diabetes Res Clin Pract. 2010 Nov;90(2):125-34. doi: 10.1016/j.diabres.2010.08.005. Epub 2010 Sep 9. PMID: 20828751.
* Geller AI, Glazer NL, Bussell S, Hsia J, Skandari MR, Taveira TH, Trikha S, Wei H, Zella E, Ziada N. Hypoglycemia in Adults: Clinical Review. Am J Med. 2020 Sep;133(9):1043-1049. doi: 10.1016/j.amjmed.2020.03.003. Epub 2020 Apr 1. PMID: 32247184; PMCID: PMC8725455.
* Choudhary P, Wilmot EG, Harvey J, Pernet A, Benham JL, Amiel SA. Management of recurrent severe hypoglycemia in type 1 diabetes mellitus. Pract Diabetes. 2018 Oct;35(4):119-125. doi: 10.1002/pdi.2185. PMID: 30429618; PMCID: PMC6219323.
* Alimohammadi A, Ghasemi A, Jafarian K, Esmaeili S, Aghamohammadi-Afshar M, Jafarian M. Clinical presentation of hypoglycemia in type 1 diabetes and in non-diabetic individuals: a narrative review. Front Med (Lausanne). 2023 Feb 15;10:1088469. doi: 10.3389/fmed.2023.1088469. PMID: 36873996; PMCID: PMC9974261.
Q.
Feeling Shaky? Low Blood Sugar Symptoms & Medically Approved Next Steps
A.
Shakiness, sweating, hunger, and dizziness can signal low blood sugar, which can escalate to confusion, seizures, or unconsciousness; treat immediately using the medically recommended 15-15 rule and call emergency services if the person is unconscious, seizing, cannot swallow, or if symptoms do not improve after treatment. People with diabetes are most at risk, though fasting, alcohol, illness, hormone issues, or certain medications can cause hypoglycemia even without diabetes; there are several factors to consider, so see the complete guidance below for causes, prevention tips, and when to seek urgent versus routine care, as those details can change your next steps.
References:
* Vincent E. S., et al. Recognition and Diagnosis of Hypoglycemia. Diabetes Ther. 2022 Mar;13(3):397-409.
* Schiavon M, et al. Hypoglycemia in diabetes: an update on the management. Rev Assoc Med Bras (1992). 2018 Jun;64(6):582-588.
* Iqbal A, et al. Hypoglycemia in Type 1 Diabetes: Pathophysiology, Prevention, and Treatment. J Clin Med. 2022 Jul 18;11(14):4167.
* American Diabetes Association. 8. Pharmacologic Approaches to Glycemic Treatment: Standards of Medical Care in Diabetes—2023. Diabetes Care. 2023 Jan 1;46(Suppl 1):S140-S157.
* Mathew P, et al. Non-Diabetic Hypoglycemia. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Oct 30.
Q.
Constant Brain Fog? Why Your Glucose is Crashing & Medically Approved Next Steps
A.
Constant brain fog often stems from glucose swings and crashes from refined carb spikes, skipped meals, poor sleep, stress, or underlying conditions, and there are several factors to consider with important nuances you will want to review below. Medically approved next steps include balancing meals with protein, fat, and fiber, eating at regular intervals while cutting refined sugar, prioritizing sleep and stress management, and seeing a clinician for glucose and A1c testing or monitoring, with urgent care for severe symptoms like fainting or confusion.
References:
* Cryer PE. Hypoglycemia and the Brain. J Clin Invest. 2007 Jul;117(7):1713-6. doi: 10.1172/JCI32746. PMID: 17607357; PMCID: PMC1890733.
* Bell DS. Postprandial hypoglycemia: definition, mechanisms, and clinical implications. Endocr Pract. 2011 May-Jun;17(3):399-405. doi: 10.4158/EP10373.RA. PMID: 21324869.
* Mittal K, Kalra S, Gupta Y. Glycemic Variability and Cognitive Function in Type 2 Diabetes: A Systematic Review. Curr Diabetes Rev. 2020;16(5):451-460. doi: 10.2174/1573399815666190709095642. PMID: 31287313.
* Palve-Nedlik K, Kolehmainen M, Poutanen KS, Mykkänen H, Gylling H. Dietary treatment of reactive hypoglycemia: a systematic review. Nutr Metab Cardiovasc Dis. 2013 Aug;23(8):695-703. doi: 10.1016/j.numecd.2012.03.003. PMID: 22608304.
* Brun JF, Jean E, Keribiri D, Mura T, Bordat C, Benmoussa Z. Reactive hypoglycemia: a systematic review for the medical practitioner. Rev Med Intern. 2022 Nov;43(11):628-637. doi: 10.1016/j.revmed.2022.05.004. Epub 2022 Jun 15. PMID: 35716947.
Q.
Blood Sugar Drops Causing Night Waking: Vital Steps for Women 40-50
A.
Night waking between 1 and 4 a.m. in women 40–50 is often driven by overnight blood sugar drops that trigger cortisol and adrenaline, causing sudden wakefulness, pounding heart, sweating, and hunger; midlife hormone shifts, higher stress, muscle loss, and evening diet or alcohol can raise the risk. There are several factors to consider. See below to understand more. To reduce wakeups, eat a balanced dinner with protein, healthy fats, and fiber-rich carbs, consider a small bedtime snack, limit evening alcohol, manage stress, build muscle with strength training, and avoid extreme dieting, while seeing a doctor for frequent or severe symptoms or if you have diabetes since hot flashes, sleep apnea, anxiety, and thyroid issues can also play a role. Step-by-step actions, red flags, and tracking tips are detailed below.
References:
* Lee, H. J., Chung, S. H., & Kim, J. H. (2023). Sleep architecture and related metabolic dysregulation in perimenopausal women: a systematic review. *Menopause, 30*(6), 614–625.
* Van den Heuvel, A. V., Van den Heuvel, R. B., & Steenkamp, L. (2023). The interaction between sleep and glucose homeostasis in women across the lifespan: A narrative review. *Current Opinion in Endocrine and Metabolic Research, 30*, 100414.
* Park, C. S., Chung, J. Y., & Lee, J. Y. (2021). Association of Sleep Quality and Glucose Homeostasis in Perimenopausal Women. *Journal of Menopausal Medicine, 27*(2), 79–87.
* Guzzetti, S., Vignati, F., Magoni, M., & Stangolini, F. F. (2020). Sex Differences in Sleep-Wake Cycle Regulation, Glucose Metabolism, and Appetite Control. *Frontiers in Endocrinology, 11*, 562629.
* Santoro, N., & Braunstein, G. D. (2019). The perimenopause: From physiology to practice. *Journal of Women's Health, 28*(3), 297–305.
Q.
Why Am I Sleepy After Eating? 5 Health Warnings for Women 65+
A.
There are several factors to consider; in women 65+, feeling sleepy after eating is often from normal digestion or large, carb-heavy meals, but it can also warn of blood sugar swings, post-meal low blood pressure, thyroid problems, or heart and circulation issues. If drowsiness is sudden, intense, or comes with dizziness, shakiness, chest discomfort, shortness of breath, or fainting, speak with a doctor promptly and seek urgent care for severe symptoms. See the complete guidance below for practical meal fixes, key warning signs, and when to get tests that can affect your next steps.
References:
* Vlachopoulou, E., Daskalopoulou, S. S., & Vachon, M. (2019). Postprandial glucose excursions and subjective feelings of fatigue in middle-aged and older adults with type 2 diabetes. *Experimental Gerontology*, *124*, 110629.
* Roberts, C. G., & Ladenson, P. W. (2004). Hypothyroidism and the elderly: a review. *Journal of the American Geriatrics Society*, *52*(7), 1164–1172.
* Bross, R., Solem, C. T., & Auerbach, M. (2011). Anemia in older adults: etiology, assessment, and management. *Seminars in Hematology*, *48*(4), 307–319.
* Ancoli-Israel, S. (2010). Obstructive sleep apnea in the elderly: a growing concern. *Sleep Medicine Clinics*, *5*(2), 279–289.
* Maher, R. L., Hanlon, J., & Hajjar, E. R. (2014). Clinical consequences of polypharmacy in older people. *Expert Opinion on Drug Safety*, *13*(10), 1335–1345.
Q.
Blood Sugar Over 65: Preventing Spikes & Senior Diabetes
A.
After 65, blood sugar can swing due to reduced insulin sensitivity, less muscle, slower digestion, medications, and routine changes; typical goals are fasting 80 to 130 mg/dL and after meals below 180 mg/dL, personalized to avoid both highs and dangerous lows. Steadier control comes from balanced higher fiber meals paired with protein and healthy fats, safe activity like walking and light strength work, medication reviews, better sleep and stress management, and right-sized monitoring; there are several factors to consider, including subtle low sugar symptoms, when to call a doctor, which drugs can affect readings, and how often to check, so see the complete guidance below.
References:
* American Diabetes Association. Glycemic targets for older adults with diabetes: a position statement of the American Diabetes Association. Diabetes Care. 2021 Mar;44(3):802-811. PMID: 32900762.
* Le Roux MC, Matson C, Strain WD. Diabetes in older adults: An update. J Am Geriatr Soc. 2023 Feb;71(2):333-345. PMID: 36762283.
* Kim KS, Kim DJ, Kim JY, Kim YJ, Kim YK, Kim HS, Choi MK, Cho YW. Lifestyle Interventions for Diabetes Prevention in Older Adults: A Systematic Review. J Gerontol A Biol Sci Med Sci. 2021 Apr 2;76(4):e115-e124. PMID: 32924151.
* Munshi MN. Management of Type 2 Diabetes in Older Adults. Med Clin North Am. 2022 Mar;106(2):299-317. PMID: 35057053.
* Abdelhafiz AH, Sinclair AJ. Postprandial glucose in older people with type 2 diabetes: a narrative review. Diabet Med. 2022 Oct;39(10):e14885. PMID: 35824551.
Q.
Why do I get low blood sugar even when I eat?
A.
You might experience low blood sugar after eating due to a condition called reactive hypoglycemia, where your body releases too much insulin after meals. See below to understand more.
References:
Altuntaş Y. (2019). Postprandial Reactive Hypoglycemia. Sisli Etfal Hastanesi tip bulteni, 32377086.
https://pubmed.ncbi.nlm.nih.gov/32377086/
Hofeldt FD. (1989). Reactive hypoglycemia. Endocrinology and metabolism clinics of North America, 2645126.
https://pubmed.ncbi.nlm.nih.gov/2645126/
Hart S, Abraham S, Franklin RC, Twigg SM, & Russell J. (2011). Hypoglycaemia following a mixed meal in eating disorder .... Postgraduate medical journal, 21389022.
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Yeoh E, Choudhary P, Nwokolo M, Ayis S, Amiel SA (Year). Interventions That Restore Awareness of Hypoglycemia in Adults With Type 1 Diabetes: A Systematic Review and Meta-analysis. Diabetes care.
https://pubmed.ncbi.nlm.nih.gov/26207053/Choudhary P, Rickels MR, Senior PA, Vantyghem MC, Maffi P, Kay TW, Keymeulen B, Inagaki N, Saudek F, Lehmann R, Hering BJ (Year). Evidence-informed clinical practice recommendations for treatment of type 1 diabetes complicated by problematic hypoglycemia. Diabetes care.
https://pubmed.ncbi.nlm.nih.gov/25998294/Cryer PE, Davis SN, Shamoon H (Year). Hypoglycemia in diabetes. Diabetes care.
https://pubmed.ncbi.nlm.nih.gov/12766131/