A member asked:

When i stand up after sitting for either a long time or short, i almost always get blurred vision, everything turns dark... this happens at least 3 times a day. when the vision starts to become black, i can still see here and there, but not perfectly. i

2 doctors weighed in across 2 answers
Dr. Heidi Fowler answered

Specializes in Psychiatry

Hi, : Hi, if i understand you correctly, you get blurred or darkened vision, with weakness of the knees and a feeling like you are going to pass out about three times after sitting for a long while and then standing up. You indicated that you have passed out from dehydration and heat stroke in the past. I cannot diagnose the reason for this. I think you need to see your doctor about this and he or she can check you for orthostatic hypotension or other conditions. Sometimes when you get up, gravity causes blood to pool in your legs, as a result, less blood is making its way up to the brain. Because the blood brings oxygen to the brain, you can feel lightheaded. Other symptoms can include feeling dizzy, having blurred or dimmed vision (sometimes to the point of being unable to see), and feeling faint. Make sure you get enough liquids every day. Sometimes eating smaller meals more often can help. Get up slowly when you go from lying to sitting or sitting to standing (especially after eating). Ask your doctor to check over your medications, to see if any of them may be contributing to this. There is potential to faint and become injured with your symptoms, so you should definitely contact your doctor. Take care.

Answered 10/3/2016

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The : The change in your position would definitely send us looking for blood pressure issues, with not enough blood going to your brain and vision centers when you sit up or stand. This is sort of unusual in a patient as young as you are. Low blood sugar, or hypoglycemia can also have similar symptoms. This can occur if you aren't eating enough as well, so make sure you are eating normal meals with balanced diet. Either way, you need to have it checked out. Maybe, if you are close to the time of year when you would have your normal doctor appointment, you can get your parents to just schedule it sooner.

Answered 10/4/2016

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