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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.
Anxiety can have a number of different causes. It is a multidimensional response to stimuli in the person's environment, or a response to an internal stimulus (for example, a hypochondriac's reaction to a stomach rumbling) resulting from a combination of general biological and individual psychological processes.