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Signs you’re about to pass out: Passing out with absolutely no warning is uncommon, but when it happens, doctors worry about heart rhythm problems — a more serious cause of fainting, McGowan says.
This is an accepted version of this page This is the latest accepted revision, reviewed on 11 February 2025. Group of endocrine diseases characterized by high blood sugar levels This article is about the common insulin disorder. For the urine hyper-production disorder, see Diabetes insipidus. For other uses, see Diabetes (disambiguation). Medical condition Diabetes Universal blue circle symbol ...
People with type 1 diabetes mellitus who must take insulin in full replacement doses are most vulnerable to episodes of hypoglycemia (low blood glucose levels). This can occur if a person takes too much insulin or diabetic medication, does strenuous exercise without eating additional food, misses meals, consumes too much alcohol, or consumes alcohol without food. [5]
Symptoms vary according to individuals' hydration level and sensitivity to the rate and/or magnitude of decline of their blood glucose concentration. [citation needed] A crash is usually felt within four hours of heavy carbohydrate consumption. Along with the symptoms of hypoglycemia, symptoms of reactive hypoglycemia include: [7] [8] [9]
While certain kinds of diabetes, like type 1 diabetes, can come on quickly, the most common type—type 2 diabetes—can be a slower process. People with excess weight and a sedentary lifestyle ...
Prediabetes, often considered the step before diabetes, is when you have higher than usual blood glucose (blood sugar) levels. Your levels aren’t high enough to be classified as type 2 diabetes.
In patients with type 1 diabetes mellitus, as plasma glucose levels fall, insulin levels do not decrease – they are simply a passive reflection of the absorption of exogenous insulin. Also, glucagon levels do not increase. Therefore, the first and second defenses against hypoglycemia are already lost in established type 1 diabetes mellitus. [2]
The symptoms of an episode of diabetic ketoacidosis usually evolve over a period of about 24 hours. Predominant symptoms are nausea and vomiting, pronounced thirst, excessive urine production and abdominal pain that may be severe. [13] [14] In severe DKA, breathing becomes rapid and of a deep, gasping character, called "Kussmaul breathing".