I am a 26 year old female who was just wondering what this issue was because I feel it sporatically. I just laid down on my stomach to use my computer and all the blood rushed from my head and I got a bad headache. I laid on my side for a second and everything is fine. This does not happen to me everytime I lay on my stomach and prop my head up on my hands actually, but it happens often. I always think it has to do with how tired my body is or how I eat.

I wanted to point out something interesting that may be a coincidence. Everyone replying to this post is a female/woman. I wonder what that has to do with this?