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Saint Charles, MO
A 19-year-old female asked:

Often, when i stand up after crouching or sitting, i get really lightheaded for a few seconds. what causes that?

1 doctor answer2 doctors weighed in
Dr. David Jakubowicz
ENT and Head and Neck Surgery 23 years experience
Orthostasis: If you get up too quickly there may be a temporary drop in blood pressure or blood flow to the brain. Also, if you are grunting or straining there can be a backup of blood draining from the brain. If you are dehydrated this can be worse. Get up slowly and make sure you have enough fluids.

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