Anxiety is your body’s attempt to keep you safe...
...but from a danger that doesn’t exist.
The anxiety state develops when you become anxious about feeling anxious.
It’s important to understand that anxiety is a bodily reaction to anxious thoughts. Your nervous system is getting you ready for “fight or flight” by pumping adrenaline and other hormones and chemicals into your bloodstream to make you better able to run away or defend yourself.
But the sensations you feel cause you to react with anxiety and fearful thoughts. Because of these fearful thoughts, your amygdala or lizard brain believes you are under threat and triggers the release of more adrenaline. It is doing what it thinks is necessary to keep you safe.
The problem is, you are not actually in any danger, so the fearful thoughts are inappropriate to the situation. The subsequent unnecessary reaction of your nervous system gives you more feelings and symptoms of anxiety (raised heart rate, sweating, shallow breathing etc.). You react to these with even more fear (second fear), causing even more intense anxiety. In the short term this can become intense anxiety, or can spiral into a full blown panic attack.
In the longer term, the anxiety symptoms become the focus of your thoughts, your nervous system becomes highly sensitized, and you slip into the anxiety state.
But all of this is not because of any real danger you faced, but simply because of how you initially reacted to anxiety.
To recover from anxiety, you must start giving your mind and body truthful messages, i.e. that you really aren’t in danger, and that the anxiety symptoms and fearful intrusive thoughts you are having are just a bluff.