Some people will have no symptoms before they are diagnosed with diabetes.
Others may notice these symptoms as the first signs of type 1 diabetes, or when the blood sugar is high:
Feeling tired or fatigued
Feeling hungry
Being very thirsty
Urinating more often
Losing weight without trying
Having blurry eyesight
Losing the feeling or feeling tingling in your feet
For others, warning symptoms that they are becoming very sick may be the first signs of type 1 diabetes, or may happen when the blood sugar is very high (see: diabetic ketoacidosis):
Deep, rapid breathing
Dry skin and mouth
Flushed face
Fruity breath odor
Nausea or vomiting, unable to keep down fluids
Stomach pain
Low blood sugar (hypoglycemia) can develop quickly in people with diabetes who are taking insulin. Symptoms typically appear when the blood sugar level falls below 70. Watch for:
Headache
Hunger
Nervousness
Rapid heartbeat (palpitations)
Shaking
Sweating
Weakness