Why do I feel dizzy when I stand up quickly after weeding the front yard?
1. Introduction Feeling dizzy upon standing quickly after weeding is caused by orthostatic hypotension, a sudden drop in blood pressure resulting from the rapid positional change from squatting to standing. When crouching, blood vessels in the legs are compressed; standing abruptly causes gravity to pull a large volume of blood downward, temporarily depriving the brain … Read more