Anxiety is created by your brain and can only be solved by your brain, but here is the problem. Anxiety is a mistake made by your brain. So unless you do something different it is quite possible that nothing can change.
The first mistake creates others and you get trapped in a loop of mistakes that feed on each other. To be free of anxiety you must learn what these mistakes are and then teach your brain to stop making them.
The first mistake your brain makes is that it creates the experience of fear without an actual threat! Think about it, the next time you are anxious as yourself...do I need to be anxious?
The second mistake your brain makes builds on the first. Your brain assumes that you are anxious because something in your external world must be threatening. The leads you to start avoiding things that are actually safe. The result is that you start organizing your life around anxiety instead of teaching your brain not to be anxious.
Learn how your brain tricks you into thinking and doing all sorts of crazy stuff. You won't believe it.