Everyone feel anxious from time to time, especially if his life is stressful, but, if he has an anxiety that is going out of control and interfere with your ability to function and relationships and makes it hard to enjoy life, he may have generalized anxiety disorder.
Generalized anxiety disorder (GAD) is an anxiety disorder that is characterized by chronic anxiety, exaggerated worry and tension, even when there is little or nothing to provoke it.
Symptoms
Generalized anxiety disorder symptoms can vary in combination and severity. They can include:
Difficulty concentrating or mind going blank
Muscle tension, aches, or soreness
Constant worrying or obsession about small or large concerns
Trouble falling asleep or staying asleep
Trembling, feeling twitchy or being easily startled
Inability to control anxious thoughts
Stomach problems, nausea, and diarrhea
Shortness of breath or rapid heartbeat

Self-help for generalized anxiety disorder (GAD)
You have generalized anxiety disorder (GAD), there are many things you can do to make yourself feel better. Effective self-help techniques for generalized anxiety disorder (GAD) include:
Handle your worries: anxieties can be as signals that you have a problem, they are alerting you to take some action. Or they are simply noises, distract, and unnecessary, so, it’s better you stop them.
Learn and practice relaxation techniques, such as meditation and deep breathing
Get daily exercise
Make sleep a priority
Eat a healthy diet
Avoid alcohol and other sedatives
Treatments
The two main treatments for generalized anxiety disorder are medications and psychotherapy. Many studies show cognitive behavioral therapy to be more effective in the long term than pharmacologic treatment (drugs such as SSRIs), and while both treatments reduce anxiety, CBT is more effective in reducing depression.
Medications
Several different types of medications are used to treat generalized anxiety disorder:
Antidepressants. These medications influence brain chemistry to block the reabsorption of serotonin in the brain.
Buspirone. This anti-anxiety medication is used to treat symptoms of anxiety, such as fear, tension, irritability and dizziness.
Benzodiazepines. These sedatives are used for short-term relief of anxiety symptoms.
Psychotherapy
Cognitive-behavioral therapy (CBT) is one type of therapy that is particularly helpful in the treatment of generalized anxiety disorder (GAD). Cognitive behavioral therapy (CBT) is a psychological method of treatment for GAD that involves a therapist working with the patient to understand how thoughts and feelings influence behavior. The goal of the therapy is to change negative thought patterns that lead to the patient's anxiety, replacing them with positive, more realistic ones. Elements of the therapy include exposure strategies to allow the patient to gradually confront their anxieties and feel more comfortable in anxiety-provoking situations, as well as to practice the skills they have learned.

Author's Bio: 

Dr.Arbasi is physician and specialize in hypnotherapy. http://hypnothai.wordpress.com