Anxiety disorder is a general term for frequent bouts of nervousness, fear, apprehension, or worrying, which appear without a reasonable cause. They can cause real, physical symptoms and affect how a person behaves. Anxiety can range from mild, which is vague and unsettling, to severe, which can be extremely debilitating and have a serious impact on daily life. Anxiety is considered a problem when the reaction that occurs is out of proportion to what my normally be expected.
Physical signs sometimes also include: