When I stand up, my eyes black out and I get dizzy for a few seconds. Why does that happen?

Hypotension. Blacking out or vision getting dim when you stand up is a drop in blood pressure called orthostatic hypotension. It is really common in young, healthy people who have low blood pressure to start with. Increasing fluid intake and sometimes salt intake can help, especially in the summer months when you can get dehydrated more easily.

Related Questions

Hi. When I stand up suddenly, my eyes black out and I get dizzy for a few seconds. Why does that happen?

See below. There are many caused of transient drop in blood pressure on standing, but mostly, it is a normal reaction. Make sure that you are properly hydrated. Drink enough water every day so that your urine is mostly colorless. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex. Get HPV vaccine. Read more...