Dizziness when standing up can have various causes, ranging in severity from 'minor' to 'life-threatening'. Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.
Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms. In order to diagnose dizziness when standing up, we could:
|PMS C||4%||Ruled out|
|Mitral Valve Prolapse||1%||Ruled out|
|Chronic Fatigue-Fibromyalgia||0%||Ruled out|
Do you ever feel dizzy / faint / lightheaded when standing up or sitting up suddenly?
Possible responses:→ Don't know
→ Never / very rarely
→ Occasionally - several times per year
→ Often - several times per month
→ Always or almost always
Patients with a bleeding ulcer may report a sense of passing out upon standing called orthostatic syncope.