Feeling dizzy or seeing blackness immediately upon standing up and walking, especially when stopping suddenly.

Generally, experiencing sudden dizziness or blacking out when standing up and stopping walking may be caused by orthostatic hypotension, anemia, cervical spondylosis, or other conditions. Treatment should be targeted according to the specific underlying cause. Detailed analysis is as follows:

1. Orthostatic Hypotension

When body posture changes abruptly—such as rising quickly from a squatting position—it may lead to orthostatic hypotension. In this condition, insufficient blood flow to the brain can cause temporary vision darkening when stopping during walking. It is important to change positions slowly.

2. Anemia

Anemia reduces oxygen levels in the blood, leading to a state of hypoxia. When standing up suddenly, the brain's supply of blood and oxygen may be temporarily compromised, resulting in symptoms such as blurred or blackened vision, dizziness, pallor, and fatigue. These symptoms can be alleviated under medical guidance using medications such as iron dextran oral solution or ferrous succinate tablets.

3. Cervical Spondylosis

Cervical spondylosis may compress the vertebral arteries, impairing cerebral blood flow. Suddenly standing up can worsen this insufficiency, causing visual darkening along with headache, dizziness, or even sudden falls. Symptoms may be relieved through massage or cervical traction.

Besides the above common causes, similar symptoms may also result from other conditions such as hypoglycemia, positional vertigo, or stroke. If any discomfort occurs, prompt medical evaluation and treatment are essential to avoid delays in diagnosis and management.