Why does my vision go black when i stand up

Dizzy spells when you stand up: When should you worry?

why does my vision go black when i stand up

Mayo Clinic does not endorse companies or products. Feeling lightheaded or dizzy after standing up; Blurry vision; Weakness; Fainting.

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Q: When I stand up, things often go dark briefly. I've always had this, but now a friend says it could be something bad. Should I worry? A: The medical term for what you're experiencing is presyncope—which is when you feel like you're about to pass out. If you actually do faint, we call that syncope.

Orthostatic hypotension, also called postural hypotension, is a sudden fall in blood pressure that occurs when you stand up quickly. Hypotension is the term for low blood pressure. Blood pressure is the force of your blood against the walls of Read More. Blood pressure is the force of your blood against the walls of your arteries. When you stand up, gravity pulls blood into your legs, and your blood pressure begins to fall.

In some people, particularly older people, blood pressure drops excessively when they sit or stand up a condition called orthostatic or postural hypotension. Symptoms of faintness, light-headedness, dizziness, confusion, or blurred vision occur within seconds to a few minutes of standing particularly after lying in bed or sitting for a long time and resolve rapidly when the person lies down. However, some people fall, faint, or very rarely have a brief seizure. Some younger people experience similar symptoms upon standing but without having a drop in blood pressure. Often, their heart rate increases tachycardia more than normal upon standing, so this condition is called postural orthostatic tachycardia syndrome POTS. The reason why such people feel dizzy despite having normal blood pressure is not yet clear.

It only lasts a few seconds. This is very common, especially among teens and pre-teens who are rapidly growing. Many people will also notice changes in their vision when this happens. After a few seconds, your heart will pump harder and more blood will make it up to your brain. If you notice dizziness and vision changes when you stand, a few things can help. Try to get up slower— first sit on the side of the bed for a few seconds, then stand up, rather than getting up all at once. Also, you can try to squeeze your fists together as you stand to increase your blood pressure.

Fainting is a temporary loss of consciousness. If you're about to faint, you'll feel dizzy, lightheaded, or nauseous. Your field of vision may "white out" or "black out. You lose muscle control at the same time, and may fall down. Fainting usually happens when your blood pressure drops suddenly, causing a decrease in blood flow to your brain. It is more common in older people.

Ask Dr. Stork: Why Does It Go Dark When I Stand?

If you are at risk of falling because of morning wooziness, tell your doctor., Orthostatic hypotension , also known as postural hypotension , [2] is a serious medical condition wherein a person's blood pressure falls when standing or sitting.


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