Symptoms of type 1 diabetes
Type 1 diabetes is a metabolic disorder primarily caused by the destruction of pancreatic beta cells, leading to an absolute deficiency of insulin and resulting in elevated blood glucose levels. Its symptoms include those of the preclinical stage, initial onset, and mid-to-late-stage diabetes.
1. Preclinical Symptoms
Most patients, during the preclinical phase of diabetes, gradually experience declining pancreatic beta cell function. By the time clinical symptoms appear, beta cell function has already significantly deteriorated. Patients may exhibit symptoms such as polyuria (frequent urination), polydipsia (excessive thirst), polyphagia (increased appetite), and weight loss.
2. Initial Onset
In fulminant type 1 diabetes, patients typically present with an abrupt onset, rapidly developing the classic "three more and one less" symptoms—excessive urination, thirst, hunger, and weight loss. This presentation resembles acute pancreatitis, including severe abdominal pain, nausea, and vomiting. In infants and children, triggering factors such as infections or stress may lead to diabetic ketoacidosis, causing symptoms like headache, irritability, drowsiness, and rapid breathing.
3. Mid-to-Late-Stage Diabetes
This generally refers to patients who have had diabetes for over 10 to 15 years. Without proper treatment, various chronic complications may develop, including diabetic microvascular disease, diabetic macrovascular disease, and diabetic neuropathy.