Anxiety attacks are created when one has thoroughly trained their body and brain to become vigilant and prepared in anticipation of the next stressful experience.
If we could trace anxiety back to the beginning, for most people it starts off with some major difficulty that caused intense emotional pressure. After the event, the memory of this experience causes the person to think about the episode over and over in anticipation of a similar event occurring again. This constant negative mental rehearsal of the past makes the individual anxious and afraid about their future moments and what potentially could happen.
From a bio-chemical standpoint. Their negative thoughts about the past produce negatively charged peptides in the Pituitary Gland in the brain, which are released into the blood stream. These peptides then make their way to the Adrenal Gland and other cells. The body then prepares to fight or run away. The Sympathetic Nervous System is switched on. Blood is taken from the digestive system and sent to the muscles. The heart rate and blood sugar levels increase and other emergency services within the body are turned on.
The cells in the body want normality. If the cells are subjected to prolonged negative thoughts and prolonged negatively charged chemicals then the cells become addicted to this negative cocktail. If the brain starts to think positively then the cells in the body feel uneasy about this positive-ness. They want normality or sameness even though this negative cocktail is detrimental to the body.
The cells send signals to the brain instructing it to deliver more of the same. The brain then reaches back into its memory bank located in the Hippocampus, finding these old memories of anxiousness. Then the brain starts mulling them over and over again in the present moment, releasing the negatively charged chemicals into the blood stream so now the cells feel normal again. This is why it is so hard to break free of anticipatory anxiety on all levels.
There are a number of ways to deal with anxious thoughts and anxious feelings in the body.