If you stand up and get dizzy, it may be anemia or postural hypotension, which should be diagnosed by routine blood tests at the hospital. Generally, if the change of position causes visual blackness and dizziness, it is mostly considered as postural hypotension, which can be relieved by keeping a fixed position and resting for a few moments. In addition to the above symptoms, anemia also includes pale skin and mucous membranes, dizziness, headache, tinnitus, vertigo, poor concentration, memory loss, muscle weakness and fatigue, low immunity and infection, lack of appetite, nausea, abdominal distension, constipation, diarrhea, oliguria and polyuria, and menstrual cycle disorders and low menstrual flow in women of childbearing age as differential diagnosis.