This makes the carbon dioxide level in your blood and brain tissue fall. Other symptoms and signs include visual changes, a feeling of impending doom, and sometimes loss of consciousness. The symptoms usually last 20-30 minutes, but it may seem like hours to anyone having them. Though scary, hyperventilation is not usually dangerous. Probably the best way to prevent hyperventilation is to avoid situations and activities that cause anxiety.
Meditation is a form of mental relaxation.
It relieves stress as you focus on a single word or visual image. Practice relaxing your muscles. Lie down in a quiet room. Close your eyes and take deep breaths. Start with your feet.