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Symptoms of diabetes: see the main signs of each type

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The disease can go unnoticed for a few years, but in advanced stages it is already possible to notice the signs.

You diabetes symptoms may vary depending on the type of disease and blood sugar level. In many cases, especially in the early stages, diabetes mellitus can be asymptomatic and its signs can appear in advanced stages.

Therefore, knowing how to identify what are the symptoms of diabetes It is essential to seek medical help and initiate appropriate treatment quickly and effectively, improving quality of life and preventing health complications.



Know more: Complications of diabetes: what they are, symptoms and prevention

Among the main signs of the disease, present in different types, are excessive hunger and thirst and the frequent urge to urinate, but there are other symptoms that can indicate diabetes. Check it out below:

Type 1 diabetes symptoms

Type 1 diabetes is a disease related to the malfunction of the immune system, in which antibodies attack cells that produce insulin, a hormone responsible for controlling blood glucose levels. Therefore, its signs can appear at any age from birth.

The main type 1 diabetes symptoms are:



According to Pedro Saddi, endocrinologist at Fleury Medicina e Saúde, excessive thirst is one of the main symptoms of diabetes because, when blood glucose is above 200-250 mg/dL, the concentration of glucose in the urine is so high that it exceeds absorption mechanisms. “With this, glucose begins to be eliminated in the urine. Glucose takes water along, which translates into increased urinary volume,” he explains.

Read more: Type 1 and 2 diabetes: do you know the difference?

Childhood diabetes symptoms

Type 1 diabetes is the most common type in children, so it is important to identify the childhood diabetes symptoms and understand if your child may have the disease. Among the main ones are:

  • Frequent urge to urinate;

  • excessive thirst;

  • Excessive hunger;

  • Weight loss;

  • Frequent tiredness;

  • Excessive sleep;

  • Itch;

  • Frequent infections.

Type 2 diabetes symptoms

Type 2 diabetes is characterized by insulin resistance or insufficient production. This is one of the main types of diabetes mellitus and represents 90% of diabetes cases in Brazil, being more frequent in adults over 40 years of age.

Unlike type 1, people with type 2 diabetes are not born with the disease and produce insulin normally. However, throughout life, due to poor eating habits, physical inactivity or genetic predisposition, the patient may present resistance to the effects of insulin.

The main type 2 diabetes symptoms are:

  • Excessive hunger;

  • excessive thirst;

  • Frequent infections, such as bladder, kidney and skin;

  • Wounds that take time to heal;

  • Visual alteration (blurred vision);

  • Tingling in the feet;

  • boils.

Symptoms of prediabetes

Pre-diabetes is the intermediate stage between healthy and type 2 diabetes. According to Pedro Saddi, as it is only a risk factor for the development of the disease, there are no prediabetes symptoms.

But then how to diagnose this condition? “The recommendation is to screen for Diabetes Mellitus according to national guidelines”, explains the endocrinologist. “All people over 45 years old and those younger who are overweight associated with an additional risk factor should have regular exams”, he adds.

Know more: Prediabetes: What is it and how to reverse this condition

Gestational diabetes symptoms

As its name suggests, gestational diabetes is characterized by increased insulin resistance during pregnancy, which may or may not persist after delivery. Its exact cause is not yet known, but it may be related to the production of hormones during the phase.

The main gestational diabetes symptoms are:

  • Excessive hunger;

  • excessive thirst;

  • Dry mouth;

  • Excessive weight gain in the pregnant woman or baby;

  • Frequent urge to urinate;

  • constant fatigue;

  • Blurred vision.

How do I know if I have diabetes?

By identifying the first symptoms of diabetes, it is essential to consult an endocrinologist, general practitioner or pediatrician, in the case of children. To confirm the diagnosis of diabetes, blood tests are required. The main options are:

  • Fasting blood glucose: reference values ​​are between 100 mg/dL and 125 mg/dL. Values ​​above 126 mg/dL are suspicious for diabetes and the test should be repeated at another time. If the result is repeated, the diagnosis is confirmed. Results above 200 mg/dL are directly considered diagnostic for diabetes;

  • Glycated hemoglobin: the reference values ​​for healthy people are between 4.5% and 5.7%. The diagnosis of diabetes is confirmed with results greater than or equal to 6.5%;

  • Glycemic curve: reference values ​​are less than 100 mg/dL fasting, and 140 mg/dL after two hours. A result greater than 200 mg/dL is considered suspicious for diabetes.



Content for educational purposes only. Consult a Doctor.

The translator user relied on the following source:

Minha Vida Website – REF99827

Disclaimer – (English version>) This content has been prepared based on information from research, additional publications, or the translation/verification work of a volunteer editor of this web council. This is a non-profit service. It is strongly recommended that all details and information published be carefully verified. We never allow medication recommendations, medication package inserts or any medication guidance. We never allow partisan politics as information.

Isenção de responsabilidade – (versão em português): Este conteúdo foi preparado com base em informações de pesquisas, publicações adicionais ou no trabalho de tradução/verificação de um editor voluntário deste conselho web. Este é um serviço sem fins lucrativos. É altamente recomendável que todos os detalhes e informações publicadas sejam verificadas cuidadosamente. Nunca permitimos recomendações de medicamentos, bulas ou qualquer orientação sobre medicamentos. Nunca permitimos a política partidária como base para checagem. Para mais informações, leia nossos termos.

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