High blood sugar can affect the fluid balance in the eyes, which may cause blurry vision. Some people notice this more at night when reading a phone, looking at lights, or waking up in the morning.
The CDC and NIDDK both list blurry vision as a common diabetes symptom. NIDDK also notes that increased thirst, urination, tiredness, unexplained weight loss, and blurred vision can be symptoms of diabetes.
Blurry vision can also come from eye strain, dry eyes, poor sleep, migraine, or vision problems. But new or repeated blurry vision should be evaluated, especially if it appears with thirst and frequent urination.
6. Tingling, Burning, or Numb Feet at Night
At night, foot symptoms can feel more noticeable because you are lying still. Some people feel tingling, burning, numbness, pins and needles, or discomfort in the toes or feet.
Over time, high blood sugar can affect nerves. Mayo Clinic notes that tingling and loss of sensation or numbness can happen in the hands and feet of people with diabetes.
Foot symptoms can also be caused by vitamin deficiencies, circulation problems, back issues, nerve compression, thyroid disease, or medications. But if tingling or numbness keeps happening, it is worth getting checked.
7. Morning Fatigue, Headache, or Brain Fog
