Anxiety
Generalized anxiety disorder (G.A.D.) is chronic and exaggerated worry and tension. People with this disorder anticipate disaster and are often excessively bothered about health, money, family, or work. Sometimes the source of the worry is hard to define -- simply the thought of getting through the day provokes anxiety. 

Many people with G.A.D.realize that their anxiety is more intense than the situation warrants. They may seem unable to relax. They often have trouble falling or staying asleep. Their worries are accompanied by physical symptoms, especially trembling, twitching, muscle tension, headaches, irritability, sweating, or hot flashes. They may feel lightheaded or out of breath. They may startle easily and tend to feel tired, have trouble concentrating, and sometimes suffer depression.

People with the disorder don't necessarily feel too restricted in social settings or on the job. Unlike many other anxiety disorders, people experiencing G.A.D. don't usually avoid certain situations as a result of their disorder. However, if severe, it can be very debilitating, making it difficult to carry out even the most ordinary daily activities.

G.A.D. is more common in women than in men and often occurs in relatives of affected persons

Successful treatment may include cognitive-behavioral therapy, relaxation techniques, biofeedback and sometimes medication.