Why do I feel extremely dizzy when getting up from a lying position?

Generally, feeling particularly dizzy when lying down or getting up may be caused by factors such as benign paroxysmal positional vertigo (BPPV), orthostatic hypotension, or vestibular neuritis, and symptoms can be relieved through medication or lifestyle adjustments. Specific details are as follows:

1. Benign Paroxysmal Positional Vertigo (BPPV): BPPV may result from abnormal calcium ion metabolism or head trauma, and can cause significant dizziness when lying down or rising, along with nausea and other discomforts. Treatment options include manual repositioning maneuvers or occlusion of the posterior semicircular canal.

2. Orthostatic Hypotension: This condition may be caused by adrenal insufficiency or maintaining the same posture for prolonged periods, leading to pronounced dizziness upon changing positions, blurred vision, and other symptoms. Medications such as midodrine or droxidopa may be used under medical guidance to alleviate symptoms.

3. Vestibular Neuritis: This inflammation may be triggered by viral infections or damage to the vestibular nerve, resulting in severe dizziness when lying down or getting up, tinnitus, and other discomforts. Treatment may include medications prescribed by a doctor, such as dimenhydrinate hydrochloride injection or scopolamine hydrobromide injection.