If high blood sugar interrupts sleep, causes dehydration, or leaves the body struggling to use glucose properly, you may wake up tired, foggy, or with a headache. This can happen even after spending enough hours in bed.
Mayo Clinic lists tiredness and headache among possible symptoms of hyperglycemia. The CDC also includes fatigue among common diabetes symptoms.
Morning fatigue is common and can have many causes, including poor sleep, stress, sleep apnea, anemia, depression, or thyroid problems. But when fatigue appears with nighttime urination, strong thirst, blurry vision, or foot tingling, blood sugar testing is a smart step.
When to Get Checked
Speak with a healthcare professional if nighttime symptoms keep happening or if you also notice increased hunger, unexplained weight loss, slow-healing sores, frequent infections, mood changes, or numbness in the hands or feet.
A doctor may recommend blood sugar tests such as fasting glucose, A1C, random blood glucose, or an oral glucose tolerance test. Symptoms can raise suspicion, but testing is the only reliable way to know what is happening.
When Symptoms May Be Urgent
