Why when I kneel for too long and then stand up my vision goes black?

[BassistForever]

Is it because my fat thighs pressing against my fat calves somehow blocking circulation?

Should I be worried?

Does this happen to you?

[sketchy]

No, it's very common (it's called "postural hypotension" if you want to google it), and it's not related to your weight.

It's just when you stand up too quickly, it causes a sudden drop in blood pressure, which makes you feel a little light-headed. It happens more often if you're a bit dehydrated too, so make sure you're drinking enough water.

If it happens all the time, then maybe see your doctor (they'll check your blood pressure etc) - otherwise, don't worry about it.

[antonlikesmlb]

It's just blood rushing to your brain. Pretty normal.

[12elizabeth]

Good question BassistForever, I always had a feeling it had something to do with blood pressure because often times it does happen to me.

[madmisskelly]

Thats normal. it's due to standing up a bit too fast and the blood rushing to your head.

[Anonymous]

You're getting a rush of blood, it's normal.