Do not panic about the symptoms that occur. because there will be no danger at all Try to control and focus by slowing your breathing. If this doesn't work, use a paper bag to cover your mouth and nose with a paper bag. This type of breathing brings carbon dioxide back into the bloodstream. It helps the blood to reduce alkalinity and bring calcium in the blood back to normal. This will cause the hands and feet to disappear in the end. You may need to see a psychiatrist for treatment advice or to consider the use of supportive medications as needed.