Hello, I am turning 13 this June.
I've been experiencing this since like for 5 months.
Every time I stand up from a couch or wake up from my sleep, my head is always aching, and my eyes are almost black-out for a short time and it seems like a sun is shining to my eyes. And one time when I stood up from the couch I suddenly fell back down to my couch again.
When I also get out of couch, when I look outside, my eyes suddenly hurt and it's black-out for a short time..
I need help because my head has been hurting so much.
Thank you.