Feeling dizzy when you wake up may be a symptom of several conditions, some more serious than others. Morning dizziness can result from a range of conditions, from simple dehydration to more complex inner ear or neurological conditions. Low Blood SugarWhen you have low blood sugar, also called hypoglycemia, you may feel dizzy or lightheaded. A Quick ReviewDizziness when you wake up is a common symptom with many potential causes, including low blood pressure from getting up too quickly, an inner ear disorder, morning low blood sugar, and medication side effects. In some cases, lifestyle adjustments and tweaks to your routine can help you manage passing morning dizziness.