Although generalized anxiety disorder may be hereditary, the symptoms of this disorder are the same, no matter the cause. To be diagnosed with generalized anxiety disorder, a person must have had constant or excessive worrying that interferes with day-to-day activities for longer than six months, according to Aetna's Intelihealth, and also must display three other symptoms that are common to generalized anxiety disorder.
Physical Symptoms
Although generalized anxiety disorder is a mental condition, many physical symptoms also occur. Sleep problems, fatigue, muscle aches, restlessness and gastrointestinal issues are common physical symptoms of generalized anxiety disorder, according to HelpGuide.com. The Mayo Clinic lists additional physical symptoms that include excessive sweating, trembling, shortness of breath and rapid heartbeat.
Mental Symptoms
Uncontrollable feelings of anxiety and worry are psychological symptoms of generalized anxiety disorder. However, other psychological symptoms also can be present, including irritability, feelings of dread, difficulty concentrating, fear of losing control, fear of rejection and an inability to relax, according to HelpGuide.org.
Symptoms in Children
Children who suffer from generalized anxiety disorder might display additional symptoms. These include perfectionism, excessive self-criticism, fear of making mistakes, need for frequent reassurance and a lack confidence, according to HelpGuide.org. Since children might have difficulty recognizing that their fears are unfounded or extreme, it is important that the adults in their lives vigilantly monitor these symptoms and get children help from a counselor if necessary.


