Please choose the correct ending to complete the given sentence: Health: [header] How to diagnose orthostatic hypotension [title] Notice dizziness when you stand. [step] The most common symptom of orthostatic hypotension is being dizzy when you stand up. This can happen after sitting or lying down for a time.

Ending1: You can automatically fall in a faint, but may also cause fainting. [substeps] Dizziness especially will come from low blood pressure. Ending2: There is some evidence that prolonged standing can be associated with a phobia that affects the nervous system such as mood or memory and so in patients with these conditions should seek medical help immediately. [title] Watch for yourself feeling weak or weak when you sit. Ending3: The dizziness or lightheadedness generally only lasts for a few seconds. [substeps] You may find that the world spins around you and you need to grab onto something or sit back down for a moment. Ending4: Dizziness can also occur in your legs and neck. You may also feel dizzy when you start walking or when you start a new sport.

Answer format: ending1/ending2/ending3/ending4