worried about worry

This excerpt is taken from here.

The overanxious person is hypervigilant. Anything and anyone may pose a hazard. There is a persistent state of arousal. The pulse is elevated, respirations are rapid, and blood pressure is high. This is essentially a fight-or-flight reaction. But where is the enemy? What is the source of threat?

Anxiety is a most distressing symptom. It is no wonder that antianxiety drugs have become perhaps the most popular prescription medicines ever produced. It is intolerable to be in a steady state of anxiety. Escape is essential.

Other signs and symptoms related to the major symptom of anxiety are as follows:

1. Tight muscles
2. Uneasiness
3. Feeling tired
4. Difficulty breathing
5. Being cross and out of sorts
6. Problems in maintaining attention
7. Sleep disturbances

-- problems in maintaining attention? hmmmm.