For a while now, every once in a while, while I'm walking, I'll feel kind of weird. My vision gets blurry and a bit flashy, and I have trouble keeping my balance. This usually lasts about 5 seconds or so and only happens about once every 3 weeks. Today, the same thing happened, but this time it lasted for 10 seconds. This odd thing about this time was that I noticed my body shaking a bit, and I also had to grab onto the wall to keep my balance. I'm only 18 years old. Does anyone have any idea what this could be? (I don't suffer from seizures or anything else, and I have no allergies or illnesses at the moment)

This is a serious situation and dangerous if it would happen while driving or some activity that would cause you to hurt yourself or others.

Please go to the doctor at once for a completely examination.

Oddly enough though, this only happens after I lie down on the couch and watch TV. When I get up, about 2 seconds later then sometimes it hits

This happens to me to. When I went to my doctor about it he told me that its something with the blood rushing to your head, and that it could be something to do with low blood pressure. When I would stand up suddenly I would get blurry spots before my eyes and feel like I was going to fall over ,same symptoms. My doctor said or it could be something to do with dehydration, oddly enough when I started drinking more water, these sensations started happening infrequently.

Im only saying from my expirence. Im sure its not serious, but never take medical advice complete to heart unless its from a doctor. Go scehdual an appointment right away, you never know.

Same here. I have low blood pressure, and I experience this sensation quite often. I would go to a doctor to have it checked out though, as others have said, just to make sure it's nothing more serious.

Hi, Student,
It could be related to High Blood Pressure also. Or, could be an inner ear infection, or many other things.
See a Doctor, Please.
I do wish you the very best of luck. and don't wait. You need to be checked out by a Doctor.