AdrenalSuccess
As Paulette and Hope have said, it's a general sign of anxiety. For me, it's a sign that anxiety is getting more serious (again).
Boy though when you burn up all your energy in those surges you have little for the rest of the day. And then that causes more stress as you can't get your commitments done.
Address the root issues of anxiety and it should go away but Magnesium baths really helped me while they were bad.