How to determine if you have diabetes

Written by Gan Jun

Endocrinology

Updated on February 16, 2025

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If a patient experiences significant symptoms of dry mouth, excessive thirst, increased urination with more foamy urine, increased appetite, but an unexplained weight loss, known as the "three polys and one low" symptoms, it is necessary to monitor fasting blood glucose. If the fasting blood glucose exceeds 7.0 mmol/L or the blood glucose two hours after a meal exceeds 11.1 mmol/L, or if there are no clear "three polys and one low" symptoms but random blood glucose levels exceed 11.1 mmol/L on two occasions, a diagnosis of diabetes can be confirmed.

At the same time, it is essential to rule out secondary effects on blood sugar levels caused by infections, trauma, or the use of steroid medications. It is also recommended that the patient undergo tests for glycated hemoglobin, as well as insulin and C-peptide release tests, to further clarify the diagnosis.

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Written by Chen Xie

Endocrinology

1min 22sec

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Symptoms of gestational diabetes

Gestational diabetes refers to abnormal glucose tolerance that occurs during pregnancy. It usually involves only mild, asymptomatic hyperglycemia without the typical symptoms of diabetes such as dry mouth, excessive thirst, frequent urination, and weight loss. However, significant increases in blood sugar can lead to symptoms such as dry mouth, excessive thirst, frequent urination, and weight loss. It is important to be vigilant for gestational diabetes in patients who exhibit symptoms such as excessive amniotic fluid, a large fetus, or recurrent urinary tract infections. Therefore, it is generally recommended for pregnant patients to complete an OGTT (Oral Glucose Tolerance Test) by the 24th week of pregnancy to confirm whether they have gestational diabetes. After childbirth, blood sugar levels in women with gestational diabetes generally return to normal, but the risk of developing Type 2 diabetes in the future significantly increases. Therefore, patients with gestational diabetes should undergo diabetes screening 6 to 12 weeks postpartum and be monitored over the long term.

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Written by Lin Xiang Dong

Endocrinology

1min 7sec

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How to test for diabetes?

The examination for diabetes primarily involves assessment based on symptoms and measuring blood glucose levels through a venous sample. Typical clinical symptoms of diabetes include "three more and one less"; where "three more" refers to dry mouth, increased thirst, and frequent urination, and "one less" refers to weight loss. Thus, generally, when these symptoms are observed, there is an awareness of the possibility of diabetes. Subsequently, one should consult a hospital for further tests, which usually include urine testing and venous blood extraction. For diabetic patients, the glucose level in routine urine tests will significantly increase. Another measure is the direct measurement of blood glucose through venous blood. A fasting blood glucose level of ≥7.0 mmol/L, or a two-hour glucose level of ≥11.1 mmol/L post-OGTT, or a random blood glucose level of ≥11.1 mmol/L, meeting any one of these conditions, combined with the symptoms of diabetes, can diagnose the disease.

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Written by Li Hui Zhi

Endocrinology

1min 2sec

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Causes of diabetic foot

The main causes of diabetic foot are as follows: The first one is poor blood sugar control in patients. Some patients have long neglected their blood sugar levels, leading to consistently high levels. The second cause is vascular disease in the lower limbs of the patient, including arteriosclerosis, with severe cases leading to occlusion and subsequent ulceration of the feet. The third reason is the presence of diabetic peripheral neuropathy in patients, which results in abnormal sensations or numbness in the feet. Many patients wearing new shoes or stepping on sharp objects inadvertently can lead to diabetic foot. The fourth cause is infection induced by patients who initially neglect minor foot injuries, or who improperly manage such injuries at home, leading to the development of diabetic foot. Therefore, we advise diabetics to maintain good control of their blood sugar and take timely measures to prevent diabetic foot.

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Written by Tang Zhuo

Endocrinology

1min 21sec

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Symptoms of diabetic foot

Diabetic foot is one of the severe chronic complications of diabetes, generally referred to as the abnormalities in the lower limbs caused by diabetic vascular neuropathy. Diabetic foot with gangrene of the extremity due to concurrent infection is referred to as diabetic foot with gangrene of the extremity, representing a serious stage in the progression of diabetic foot. The main symptoms of diabetic foot include: first, subcutaneous fat atrophy, thinning of the skin, common pigmentation spots on the shin, no hair on the feet and toes, and thickening of the toenails often accompanied by fungal infections; second, atrophy of the extremity muscles, malnutrition, poor muscle tone, and susceptibility to injury in joints and ligaments; third, visible sinking of the finger joints, joint bending, weakening or disappearance of foot deformities, and cool, swollen skin at the extremities; fourth, patients often experience extremity pain, numbness, sensory abnormalities, and dull or absent deep and superficial reflexes. In the initial stages of diabetic foot gangrene, blistering, blood blisters, erosion, and infection can gradually develop into ulcers, gangrene, or necrosis. Clinically, this is manifested as localized redness, swelling, increased skin temperature, pain, functional impairment, and the presence of purulent secretions, sometimes accompanied by a foul odor.

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Written by Chen Xie

Endocrinology

1min 11sec

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Gestational diabetes symptoms

Gestational diabetes refers to the abnormal glucose tolerance that occurs during pregnancy, typically characterized by mild, asymptomatic elevated blood sugar levels without obvious symptoms such as dry mouth, excessive thirst, and frequent urination. However, when blood sugar levels are high, symptoms typical of diabetes such as dry mouth, excessive thirst, and frequent urination may occur. If excessive amniotic fluid, a large fetus, or recurrent infections of the external genitalia occur during pregnancy, it is important to be vigilant for the presence of diabetes. It is generally recommended that patients undergo the OGTT (Oral Glucose Tolerance Test) during the mid-stage of pregnancy to confirm whether gestational diabetes is present. Women's blood sugar levels generally return to normal after childbirth, but the risk of developing diabetes later increases significantly. Therefore, patients with gestational diabetes should be screened for diabetes 6-12 weeks postpartum and monitored over the long term.