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How to spot a person with anxiety disorder 
Learn about generalized anxiety disorder. 
Generalized anxiety disorder, or gad, involves feeling nervous or tense all the time, even when no obvious stressors are present. People with gad may feel like something bad is about to happen, or they may imagine all the ways something could go wrong.
People with gad often have a hard time dealing with change. They may become anxious or upset when plans change or something unexpected happens.