Anxiety, or extreme apprehension and worry, is a normal reaction to stressful situations. In some cases, however, worry becomes excessive or chronic and can cause sufferers to dread everyday situations.
The condition of steady, pervasive anxiety is called Generalized Anxiety Disorder. Yet there are numerous anxiety-related disorders. One is panic disorder—severe episodes of anxiety that occur in response to specific triggers. Another is obsessive-compulsive disorder, marked by persistent intrusive thoughts or compulsions to carry out specific behaviors, such as hand-washing. Post-traumatic stress disorder may develop after exposure to a terrifying event in which severe physical harm occurred or was threatened. Anxiety so frequently co-occurs with depression that the two are thought to be twin faces of one disorder. Like depression, anxiety strikes twice as many adult females as males.
Generally, anxiety arises first, often during childhood. Evidence suggests that both biology and environment can contribute to the disorder. Some people may have a genetic predisposition to anxiety; however, even so, development of the condition is not inevitable. Early traumatic experiences can also reset the body’s normal fear-processing system so that it is hyper-reactive.
Anxiety is typified by exaggerated worries and expectations of negative outcomes in unknown situations, and such concerns are often accompanied by physical symptoms. These include muscle tension, headaches, stomach cramps, and frequent urination. Behavioral therapies, with or without medication to control symptoms, have proved highly effective against anxiety, especially in children.