Prolonged exposure to drugs or alcohol.

Anxiety that is related to a specific situation or object.

A mood disorder where the person shifts from one extreme to another extreme for no apparent reason.

An illness that affects the mind and reduces a person's ability to function, adjust to change or get along with others.

Fear of spiders

A person is at greater risk of getting a mental disorder if a family member has it.

A fear caused by something you can't identify or something that doesn't pose as much of a threat as you think.

Feeling of hopelessness and extreme sadness.

An unwanted thought or image that takes control of the mind.

Fear of flying

Damage to the brain.

Checking things over and over or performing rituals over and over.

Means "split mind."

An unreasonable need to behave in a certain way to stop or prevent a feared outcome.

Fear of heights

The dealth of a loved one is an example.

People who survive a life threatening event may develop this.

Kleptomania and gambling addiction.

A category of disorders where people experience extreme emotions that make it difficult to function well in their daily lives; bipolar is an example.

Fear of small, closed-in places.

Negative experiences that occur when a person is a child, such as being molested.

Symptoms may include a fast heart rate, faster breathing, fear of suffocation and nausea in the stomach.

Displaying rigid patters of behavior that make it difficult for them to get along with other people and relate to other people.

Rarely harmful to others. At times they appear normal and other times may talk to themselves. They may believe that someone or something controls their thoughts or wants to harm them.

Fear of open places or public.