What causes dizziness when standing up suddenly?

Generally, dizziness upon suddenly standing up may be caused by orthostatic hypotension, transient cerebral ischemia, vascular lesions, or similar reasons. It can usually be improved and treated through medication or lifestyle modifications.

1. Orthostatic Hypotension: This is typically caused by adverse drug reactions, severe anemia, adrenal cortical insufficiency, or similar factors. Symptoms often include dizziness, trembling, nausea, vomiting, blurred vision, and fainting when standing, which may lead to dizziness upon sudden standing. Patients are advised to take medications such as levodopa tablets or oryzanol tablets under a doctor's guidance.

2. Transient Cerebral Ischemia: This is generally caused by cerebral vessel narrowing or spasm, among other factors. Common symptoms include sudden dizziness, blacking out of vision, slurred speech, and numbness in the limbs, which may also result in dizziness upon sudden standing. Patients are advised to take medications such as aspirin tablets or Naoxintong capsules under medical supervision. In daily life, it is important to maintain regular sleep patterns, eat a balanced diet, and avoid abrupt movements such as sudden bending or rapid spinning.

3. Vascular Lesions: These are usually caused by conditions such as hypertension or hyperlipidemia. Symptoms may include chest pain, abdominal pain, and sudden unconsciousness, and may also cause dizziness upon standing up quickly. Patients are advised to take medications such as aspirin tablets or clopidogrel hydrogen sulfate tablets under a doctor’s direction.