What should I do now?
Call 911
Call 911 for new or unexplained chest pressure that persists or returns, severe trouble breathing, collapse without normal recovery, or sudden face/arm weakness or trouble speaking. Do not drive yourself.
Contact your care team
Contact your care team for new or recurrent dizziness or near-fainting. Seek urgent assessment if symptoms are severe.
Keep your care plan
Sit or lie down safely during symptoms and note timing and medication changes.
SECTION 2
What can cause dizziness?
Blood pressure changes
Standing can sometimes cause blood pressure to fall. This is called orthostatic hypotension. Dehydration and certain medicines can contribute.
Heart rhythm problems
A heartbeat that is too slow, too fast, or irregular can sometimes reduce blood flow to the brain and make you feel faint.
Problems with the heart’s electrical system may cause a slow pulse and lightheadedness. This is one possible cause.
Other causes
Inner-ear disorders, migraine, anemia, low blood sugar, medicines, and anxiety may contribute. Spinning with head movement can suggest an inner-ear problem, but the pattern alone does not establish the diagnosis.
Updated October 2026. Educational information; your own care plan may differ. Medical illustrations are simplified examples for teaching.