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Recognising the Symptoms of Diabetes

In type 1 diabetes the symptoms tend to develop more quickly, over a couple of weeks, and are more severe. In type 2 diabetes the symptoms develop slowly and are usually not so severe. For this reason, symptoms may go unnoticed for years, and only when complications of diabetes - such as foot ulceration or blurred vision or impotence occur - is the diabetes diagnosed. Remember that all the symptoms may not be present. Whenever any of the symptoms arise it's important to test for diabetes.

Common symptoms of both major types of diabetes

• Fatigue: In diabetes, the body is inefficient and sometimes unable to use glucose for fuel. The body switches over to metabolizing fat, partially or completely, as a fuel source. This process requires the body to use more energy. The end result is feeling fatigued or constantly tired.
• Unexplained weight loss: People with diabetes are unable to process many of the calories in the foods they eat. Thus, they may lose weight even though they eat an apparently appropriate or even excessive amount of food. Losing sugar and water in the urine and the accompanying dehydration also contributes to weight loss.
• Excessive thirst (polydipsia): A person with diabetes develops high blood sugar levels. The body tries to counteract this by sending a signal to the brain to dilute the blood, which translates into thirst. The body encourages more water consumption to dilute the high blood sugar back to normal levels and to compensate for the water lost by excessive urination.
• Excessive urination (polyuria): Another way the body tries to get rid of the extra sugar in the blood is to excrete it in the urine. This can also lead to dehydration because excreting the sugar carries a large amount of water out of the body along with it.
• Excessive eating (polyphagia): If the body is able, it will secrete more insulin in order to try to deal with the excessive blood sugar levels. Also the body is resistant to the action of insulin in type 2 diabetes. One of the functions of insulin is to stimulate hunger. Therefore, higher insulin levels lead to increased hunger and eating. Despite increased caloric intake, the person may gain very little weight and may even lose weight.
• Poor wound healing: High blood sugar levels prevent white blood cells, which are important in defending the body against bacteria and also in cleaning up dead tissue and cells, from functioning normally. When these cells do not function properly, wounds take much longer to heal and become infected more frequently. Also, long-standing diabetes is associated with thickening of blood vessels, which prevents good circulation and our body tissues from getting enough oxygen and other nutrients.
• Infections: Certain infection syndromes, such as frequent yeast infections of the genitals, skin infections, and frequent urinary tract infections, may result from suppression of the immune system by diabetes and by the presence of glucose in the tissues, which allows bacteria to grow well. They can also be an indicator of poor blood sugar control in a person known to have diabetes.
• Altered mental status: Agitation, unexplained irritability, inattention, extreme lethargy, or confusion can all be signs of very high blood sugar, ketoacidosis, or hyperosmolar hyperglycemia nonketotic syndrome or hypoglycemia (low sugar). Thus, any of these merit the immediate attention of a medical professional. Call your health care provider or 911.
• Blurry vision: Blurry vision is not specific for diabetes but is frequently present with high blood sugar levels.

Diabetes may be detected in a routine urine test where excess glucose is present. In the case of type 1 diabetes, people often develop symptoms over a short period of time, usually weeks. They may feel thirsty all the time and need to urinate a lot, and they may feel tired and lose weight. A blood test that measures the level of glucose in the blood will confirm whether or not the underlying cause is, indeed, diabetes.