Diabetes mellitus is a group of disorders of sugar, fat and protein metabolism syndromes caused by defective insulin secretion or insulin resistance with hyperglycemia as the basic pathological change. Its damage is a chronic progressive process, with different symptoms at different stages. There is no obvious difference between men and women in the symptoms of ordinary diabetics, but there is a special type of diabetes that occurs only in women, that is, gestational diabetes. Symptoms of common diabetes are as follows: Early diabetes: The absence of symptoms is its most characteristic feature. Patients can only be seen in the examination of blood glucose elevation, shorter duration of the disease or blood glucose elevation is limited, there can be no clinical symptoms, but the specific blood glucose how high the beginning of the emergence of symptoms is not a specific indicator, each patient has a great deal of specificity. Typical Symptoms: The most common symptoms are often referred to as three more and one less, i.e., polyuria, polydipsia, polyphagia and emaciation. Mostly due to the blood glucose in the blood caused by osmotic pressure increases, causing thirst, drinking more, more urine symptoms. Due to the relative or absolute lack of insulin, the glucose in the body can not be utilized, protein and fat consumption increases, thus causing fatigue and weight loss; in order to compensate for the loss of sugar, to maintain the body activity, so it produces hunger and overeating. Atypical symptoms: some patients with type 2 diabetes have atypical symptoms, only dizziness, fatigue, etc., or even no symptoms. Some early onset or pre-diabetes onset stage, can appear before lunch or dinner hypoglycemia symptoms. The common feature is that it is not characteristic, and patients usually consult the doctor with other symptoms and find the abnormality of blood glucose by chance. Or it is found by general health checkup. Acute Complications: The condition of diabetic patients can be aggravated suddenly under stressful situations, generally due to the osmotic pressure abnormality caused by the rapid increase of blood glucose, and then in different organs to cause the corresponding effects, may appear loss of appetite, nausea, vomiting, abdominal pain, polyuria aggravated, dizziness, drowsiness, blurred vision, difficulty in breathing, hyperosmolar coma, ketoacidosis, and so on. Chronic complications: generally only appear in patients with long-term hyperglycemia, but there are also patients who come to the first consultation due to complications because the primary symptoms are not obvious. Commonly, there are diabetic retinopathy, diabetic nephropathy, diabetic neuropathy, recurrent infections, diabetic foot, itchy skin and so on. In the case of gestational diabetes, the presentation can be characterized by two aspects: the symptoms of diabetes in general and the symptoms specific to pregnancy. Symptoms common to diabetes in general will also appear in patients with gestational diabetes, but due to the limited duration of the gestation period, it usually does not develop to the stage of chronic complications, and a few serious patients may have acute complications. It is important to note that symptoms specific to pregnancy, such as previous pregnancies with a history of recurrent miscarriages, unexplained stillbirths or stillbirths, neonatal deaths, macrosomia, amniotic fluid or fetal malformations, these manifestations are related to the presence of diabetes mellitus in some way, this is because of the adverse effects of high blood glucose on the development of the fetus, so that these conditions are both the result of gestational diabetes and, in turn, are also the result of his Manifestations. Urine glucose, blood glucose and glucose tolerance measurements in people with a history of these conditions or a family history of these conditions will often reveal abnormalities. Therefore, with the exception of gestational diabetes, there is no significant difference between men and women in the symptoms of the average diabetic, and gestational diabetes does not usually progress to the stage of chronic complications.