A number of medical conditions can cause anxiety symptoms. These include an overactive thyroid, hypoglycemia, mitral valve prolapse, anemia, asthma, COPD, inflammatory bowel disease, Parkinson's disease, and dementia among others. Your physician may perform certain tests to rule out these conditions. But it is important to remember that anxiety is more often due to poor coping skills or substance abuse than any medical condition.
Warren: With anxiety to the point where it’s part of a disorder — let’s say generalized anxiety disorder, mostly characterized by anxiety and worry about a whole bunch of different situations — we would treat it by teaching a patient about the role of worry in creating the symptoms and how to manage the worry. That sometimes involves challenging unrealistic thoughts or working to increase one’s ability to tolerate uncertainty, which is a big part of anxiety.
If you're having lots of panic attacks at unpredictable times and there doesn't seem to be a particular trigger or cause, you might be given a diagnosis of panic disorder. It's common to experience panic disorder and agoraphobia (a type of phobia) together. People who experience panic disorder may have some periods with few or no panic attacks, but have lots at other times.