Everyone experiences some degree of anxiety in life. When anxiety becomes persistent, frequent, and intense, we might classify that as an anxiety disorder. People who experience high levels of anxious symptoms will notice physical symptoms such as their heart racing, sweating, shallow breathing, and racing thoughts. They may also notice feeling nervous, restless or tense and experience feeling threatening or in danger.
There are several different types of anxiety disorders which include generalized anxiety, panic disorder, separation anxiety, social anxiety disorder, and phobias.
The cause of anxiety disorders is not totally understood, there can be deeper underpinnings linked to earlier traumatic experiences in life. Anxiety is then the symptom when the earlier trauma is triggered.
Similar to depression, people experiencing high levels of anxiety can be treated through psychotherapy with CBT and sometimes pharmaceuticals can help.