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This section discusses 895 medical conditions causing Anxiety. A simple discussion of these causes with additional information is below. The following medical conditions are some of the possible causes of Anxiety. There are likely to be other possible causes, so ask your doctor about your symptoms. 1  Normal anxiety. 2  Normal fear. 3  Emotional disorders Anxiety disorders. Generalized anxiety disorder.  Physical conditions causing anxiety include: Hyperthyroidism. 1  Hyperglycemia. Marijuana - a form of cannabis. 2  Cannabis. Amphetamine intoxication.  Alcohol withdrawal.
It's well known that anxiety can cause heart palpitations, and it's believed that the main cause may be an over-awareness of one's own heart, combined with surges of adrenaline that may occur at random in those with anxiety. These types of palpitations often trigger panic attacks.