Does hypoglycaemia cause dizziness?

A drop in blood glucose may feel like lightheadedness, unsteadiness, weakness, or a sense that you might faint. Sweating, hunger, trembling, palpitations, headache, irritability, and trouble concentrating can occur at the same time. Dizziness has many causes, including dehydration, low blood pressure, inner-ear problems, medicines, and heart rhythm changes, so the symptom alone does not identify hypoglycaemia.

Sit or lie down to reduce the chance of falling. If you are awake, can swallow normally, and suspect low glucose, check it if possible and use the fast-acting treatment in your personal hypo plan. Recheck as directed and have a meal or sustaining snack when advised. Avoid driving, alcohol, and strenuous activity until you are fully recovered. If episodes repeat, record food, activity, medicines, readings, and timing for your clinician.

Call emergency services for dizziness with confusion, seizure, collapse, inability to swallow, loss of consciousness, chest pain, severe breathlessness, or new one-sided weakness. Do not give food or drink to someone who is unconscious, having a seizure, or unable to swallow. Get prompt medical advice for repeated episodes or dizziness that persists after glucose has been corrected.

How can I confirm whether an episode is caused by low glucose? Could my medication, meals, or activity be involved? What treatment should I keep available? Which symptoms require an ambulance?