Anxiety disorders are a group of disorders which affect behaviour, thoughts, emotions and physical health.
Research into their origins continues, but it is believed they are caused by a combination of biological factors and an individuals personal circumstances, much like other health problems, such as heart disease or diabetes.
It is common for people to suffer from more than one anxiety disorder; and for an anxiety disorder to be accompanied by depression, eating disorders or substance abuse. Anxiety disorders can also coexist with physical disorders, in which case the physical condition should also be treated.
