There are man types of anxiety disorders and each has a distinct feature. However they are common bound together by the theme of excessive irrational fear and dread. Others conditions can include eating, alcohol or drug abuse. Few of the anxiety disorders are:

Panic Disorder,

Obsessive-Compulsive Disorder,

Post-Traumatic Stress Disorder,

Social Phobia (Or Social Anxiety Disorder),

Specific Phobias, And

Generalized Anxiety Disorder.

People with panic disorder have feelings of terror that strike suddenly and repeatedly with no warning. It makes a person feel sweaty, weak, dizzy and even faint. Hands may tingle or feel numb, and feel flushed or chilled. Other symptoms include heart pounding, chest pain, a sense of unreality, or fear of impending doom or loss of control. This attack can occur anytime even during sleep.

Other serious conditions are depression, drug abuse, or alcoholism and may lead to a pattern of avoidance of places or situations where panic attacks have occurred.

Obsessive-Compulsive Disorder is one of the most difficult to understand of all psychiatric illnesses. Persons who have this condition find themselves repeating certain behaviors or thoughts again and again and again and again. They know the repetition is unnecessary, but are unable to stop them.

Common forms of this are checking locks, stoves, and lights, or recurrent intrusive thoughts of hurting oneself or one's children.

Post-traumatic stress disorder is a condition that can develop following a terrifying event.
The thoughts and memories of the ones they were close to and the traumatic incidents that occurred in their lives, make them persistent frightening. Violent attacks, rape, torture, mugging, kidnapped, accidents, natural calamities, abuse etc are some of the events that can trigger PTSD.

Whatever the source of the problem, these traumas repeat in the form of nightmares and recollections even during the days.

People suffer from sleep problems, feel detached or numb, be easily startled lose interest in things and have trouble feeling affectionate. They may feel irritable, more aggressive, or even violent. Things that remind them of the trauma may be very distressing, which could lead them to avoid certain places or situations that bring back those memories.

Social phobia, also called social anxiety disorder, involves overwhelming anxiety and excessive self-consciousness in everyday social situations. This often co-occurs with other anxiety disorders or depression and usually begins in childhood or early adolescence, and there is some evidence that genetic factors are involved. Physical symptoms include blushing, profuse sweating, trembling, nausea, and difficulty talking.

People with social phobia have a persistent, intense, and chronic fear of being watched and judged by others and being embarrassed or humiliated by their own actions. While many people with social phobia recognize that their fear of being around people may be excessive or unreasonable, they are unable to overcome it. They often worry for days or weeks in advance of a dreaded situation.

Social phobia can be limited to only one type of situation- such as a fear of speaking in formal or informal situations, or eating, drinking, or writing in front of others-or, in severe form, a person experiences symptoms anytime when people are around.

Social phobia can severely disrupt normal life, interfering with school, work, or social relationships but can be treated successfully with carefully targeted psychotherapy or medications.

This is a condition of an intense fear of something that poses little or no actual danger. Examples are closed-in places, heights, escalators, tunnels, highway driving, water, flying, dogs, and injuries involving blood. This is more common is women than men. Specific phobias usually first appear during childhood or adolescence and tend to persist into adulthood

Such phobias are irrational fear of a particular thing. Knowing that their fear is irrational people always find that facing, or even thinking about facing, the feared object or situation brings on a panic attack or severe anxiety. They can be treated with carefully targeted psychotherapy.

Generalized anxiety disorder (GAD) is much more than the normal anxiety people experience day to day. GAD comes on gradually and most often hits people in childhood or adolescence, but can begin in adulthood, too and is common in women than men. This disorder makes people to always anticipating disaster, often worry excessively about health, money, family, or work or other small simple things.

They wont be able to relax and always have trouble falling or staying asleep. Their worries are accompanied by physical symptoms, like trembling, twitching, muscle tension, headaches, irritability, sweating, or hot flashes. They may also feel lightheaded or out of breathe. They feel nauseated, or have a lump in the throat and go to the bathroom frequently.

It makes them difficult to come out from this unnecessary anxiety and tension, which is actually not required. They get startle easily and feel tired, cannot concentrate and suffer from depression, gets irritability have muscle tension. They can be treated with carefully targeted psychotherapy.