Depression, schizophrenia, anxiety disorder, and bipolar disorder are examples of psychiatric disorders, claims the University of Washington. Signs of depression include a lack of pleasure in daily activities, insomnia, and feelings of worthlessness and guilt. Schizophrenia affects the mind, causing delusions, hallucinations, and paranoia. A response of fear and anxiety when dealing with thoughts, people and situations, characterize anxiety disorders. Bipolar disorder involves mood swings ranging from mania to depression.
A psychiatric disorder, also known as a mental illness, is a brain disease that causes disturbances in behavioral and thought patterns, making it hard to cope with life's obligations, according to the Mental Health Association in Forsyth County. There are different types of anxiety disorders, including panic disorder, phobias, obsessive compulsive disorder and post-traumatic stress disorder. Major depression, bipolar disorder, dysthymia and seasonal affective disorder are types of depressive disorders, according to Boston University.
Causes of psychiatric disorders may be genetic or biochemical. Situations that cause increased stress may also contribute to the development of mental illness, claims the Mental Health Association of Forsyth County.
Warning signs of psychiatric disorders include excessive fear, social withdrawal, suicidal thoughts, substance abuse, delusions and hallucinations. Other signs include prolonged depression, confused thinking and changes in eating or sleeping habits, reports the Mental Health Association of Forsyth County.