Blood pressure and dizzy spells

Lightheadedness after standing can reflect a temporary drop in blood pressure. A spinning sensation may instead suggest an inner-ear problem such as Benign Paroxysmal Positional Vertigo. Dehydration, Heat Exhaustion, low blood sugar, anaemia, anxiety, an irregular rhythm, or a medicine effect can also cause dizziness.

The pattern matters: note whether the room spins, you feel faint, your heart races, or symptoms follow standing, meals, heat, or exertion. One reading cannot explain every episode.

Sit or lie down immediately, move slowly, and avoid driving, climbing, or operating machinery until you feel steady. Drink fluids if you can do so safely, unless a clinician has restricted your intake. Record the time, activity, symptoms, medicines, and blood-pressure reading after resting.

Do not change or skip prescribed treatment without advice. Arrange a review if episodes recur, follow a new medicine, or interfere with walking, work, or daily activities.

Call emergency services for dizziness with fainting, chest pain, severe breathlessness, a new severe headache, confusion, trouble speaking, facial drooping, one-sided weakness, or inability to walk. Seek prompt assessment for repeated falls, a very irregular heartbeat, or dizziness that does not settle.

Ask whether your medicines, hydration, blood sugar, heart rhythm, or balance system could explain the pattern, and whether you need lying and standing blood-pressure checks or blood tests.