What Causes It?
Autoimmune reaction - The body's immune system mistakenly attacks and destroys insulin-producing beta cells in the pancreas.
Genetic susceptibility - Certain genes increase the risk, though not everyone with these genes develops the condition.
Environmental triggers - Possible factors include certain viruses (like Coxsackie virus, mumps, or rubella), early exposure to cow's milk protein, or vitamin D deficiency.
Family history - Having a parent or sibling with type 1 diabetes increases risk, though most people with type 1 don't have a family history.
Geography - In India, there are significant regional variations in prevalence, with Karnataka showing 17.93 cases per 100,000 children, Chennai showing 3.2 cases per 100,000, and Karnal (Haryana) showing 10.2 cases per 100,000.
Urban-Rural divide - In India, urban areas show significantly higher prevalence (26.6 per 100,000) compared to rural areas (4.27 per 100,000), which may be related to differences in environmental factors, diagnosis rates, or access to healthcare.
Age - Can develop at any age but most commonly appears in children and adolescents. In India, the prevalence in the 5 to 14 years age group is 24.22 per 100,000, while in the 0 to 6 years age group, it is 3.82 per 100,000.
Unknown factors - Despite extensive research, the exact combination of factors that trigger type 1 diabetes remains unclear.
Note: Type 1 diabetes is NOT caused by eating too much sugar, being overweight, or lifestyle factors, unlike some cases of type 2 diabetes.
Signs & Symptoms
Increased thirst (polydipsia) - Often extreme and unquenchable.
Frequent urination (polyuria) - Including bed-wetting in previously toilet-trained children.
Extreme hunger (polyphagia) - Despite eating more than usual.
Unexplained weight loss - Despite normal or increased appetite.
Fatigue and weakness - Due to cells being deprived of glucose for energy.
Irritability and mood changes - Often attributed to hunger or fatigue.
Blurred vision - From glucose buildup affecting the lens of the eye.
Fruity-smelling breath - A sign of ketone buildup (ketosis).
In young children, symptoms may develop rapidly over days or weeks.
In teenagers, symptoms may develop more gradually.
If unrecognized and untreated, symptoms can progress to diabetic ketoacidosis (DKA), a life-threatening condition with:
Nausea and vomiting
Abdominal pain
Deep, rapid breathing (Kussmaul respiration)
Confusion or loss of consciousness