The six main types of anxiety disorders are:

A typical variant is selective mutism, which may be often seen in kids who are confident in front of their family but may not speak at all in school or other places.

• Generalized anxiety disorder (GAD): It is a long-term disorder that makes a person inappropriately anxious in mundane situations. People with GAD are anxious most of the time and seldom remember when they last felt relaxed. They feel constantly worried, and restless and find it hard to concentrate on work.
• Panic disorder: It manifests as sudden, intense fear associated with profuse sweating, restlessness, chest pain, and a racing or pounding heartbeat (palpitations) often mimicking a heart attack.  People with panic disorder may experience anxiety or panic attacks which are extreme and intense periods of restlessness or fear that affect associated with a pounding heartbeat, sweating, trembling, sensations of choking or being unable to breathe, extreme nausea, dizziness, and chest tightness or pain. 
• Social phobia or social anxiety: Feeling of overwhelming worry and self-consciousness about everyday social situations plague people with social anxiety. A typical variant is selective mutism, which may be often seen in kids who are confident in front of their family but may not speak at all in school or other places. Though many people may feel anxious about speaking in public, social anxiety involves extreme and irrational fear and anxiousness about facing people.
• Separation anxiety: It happens when a loved one leaves. It is often seen in small children who feel scared or anxious when a parent goes to work, for example. It can also affect adults who worry that something bad may happen to their loved ones when they are out of sight. People with separation anxiety fear being alone. They may even find it difficult to sleep when away from home or their loved ones.
• Trauma– and stressor-related disorders: They are related to the experience of a trauma or tragedy (e.g., unexpected death of a loved one, a car accident, or a violent incident like war or sexual assault) or stressor (e.g., divorce, beginning college, moving). Post-traumatic stress disorder is the most typical type of trauma and stressor-related disorder.
• Phobias: They are excessive fears about a specific situation or object. The fear or anxiety is markedly disproportional to the actual threat involved. Common phobias include agoraphobia (intense fear of being in open, crowded places), acrophobia (fear of heights), and claustrophobia (fear of enclosed places).

What does anxiety mean?

Anxiety disorders are characterized by irrational worry, fear, and panic in response to mundane situations. Six types include panic disorder, social phobia, generalized anxiety, and others.

We all get worried or scared in response to specific situations in our lives. On a clinical level, anxiety refers to the state of extreme worry, fear, and panic for the majority of your day. Trivial situations or even the anticipation of situations that have not happened will trigger these feelings in someone with a clinical anxiety disorder.

Anxiety has various causes. Some major causes are:

• Low self-esteem
• Genetics: people with a family history of anxiety disorders are more likely to experience anxiety
• Chemical disorders in the brain
• Environment factors such as harassment, abuse, violence, rejection, and death of a loved one
• Drug abuse or withdrawal
• Other mental health issues such as depression and bipolar disorder.

Panic attacks are repeated attacks of fear that can last for several minutes. See Answer