July 11, 2007

When I suddenly stand up from lying down or sitting, why do I get darkening of eyesight for a few seconds?

Along with darkening, I also feel like thousands of ants running all over my face. Only after a few seconds of standing still with closed eyes, I am able to move.

  1. This is there since my childhood. The blood test says I don't have any abnormal size of blood cells, but my RBC count equals female-values. May be I was on iron medication so the problem wouldn't show up immediately in tests. But my iron levels keep coming down after rising. I have felt most healthy and most fresh and energetic, and also free of the above symptoms, when I had the most RBC and haemoglobin count.
  2. Dimmed vision, dizziness, and crawling skin after getting up quickly can be a sign of low iron, low blood pressure, or simply the result of pooled blood rushing downwards due to gravity. Keep checking with your doctor. Good luck.
  3. Thank you.
  4. It sounds like low blood pressure (hypotension)…..

    As to the underlying cause, I can only speculate…..Are you on any medications? have you been tested for diabetes?

    Have your blood pressure tested….

    ~Donkey Hotei

  5. It sound slike postural hypotension, which means that as you stand your body does not adjust as it should to the new conditions.
  6. It may be an issue with your blood pressure. Lying down causes your blood to "pool" and when you stand up suddenly, the sudden elevation can cause a drop in blood pressure. Therefore, not enough blood is getting to your head and you see the light flashes and are dizzy and have the "ants crawling" feeling. I get that myself if I sit or lie down for a while and stand up suddenly and I know my blood pressure is lower than normal. So, I tend to move a bit more slowly to compensate. I also suffer for a touch of anemia, as well, and should be on iron, but I can't tolerate it.
  7. Doctors say the RBC count has to be too low for any kind of anaemia to be present. But I want to disagree.
  8. Maybe you should talk to your Dr. about it being something with your blood pressure. Try sitting up slowly then when you feel ok, slowly stand up. You have to give it a second to adjust.
  9. It's called orthostatic syncope. when you stand up gravity takes over and doesn't allow the blood flow to get to your head quick enough. therefore, reducing the blodflow to your brain which is actually reducing oxygen to your brain. Without the needed oxygen for those 2-3 seconds it can cause a fainting like symptom.
  10. This situation is preventing me from building my body (LOL!), as also from numerous other tasks.
  11. Some suggestions for minimizing the effects include:
    * Checking blood pressure regularly with a home monitoring kit. Check when lying flat and when standing as well as when symptoms occur.
    * Standing slowly rather than quickly, as the delay can give the blood vessels more time to constrict properly. This can help avoid incidents of syncope.
    * Take a deep breath and flex your abdominal muscles while rising to maintain blood and oxygen in the brain (may be contraindicated in individuals with Stage 3 hypertension).
    * Maintaining an elevated salt intake, through sodium supplements or electrolyte-enriched drinks. A suggested value is 10 g per day; overuse can lead to hypertension and should be avoided.
    * Maintaining a proper fluid intake to prevent the effects of dehydration.
    * As eating lowers blood pressure, eat multiple smaller meals rather than fewer larger meals. Take extra care when standing after eating.
    Please see the web pages for more details on Orthostatic hypotension.
  12. I also feel completely fatigued the whole day, and have light-headedness all the time. I feel colder than others.

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