Anxiety Disorders
Anxiety disorders are the most common mental illnesses. The three main types are: phobias, panic disorders and obsessive-compulsive disorders. People who suffer from phobias experience extreme fear or dread from a particular object or situation. Panic disorders involve sudden, intense feelings of terror for no apparent reason and symptoms similar to a heart attack. People with obsessive-compulsive disorder try to cope with anxiety by repeating words or phrases or engaging in repetitive, ritualistic behavior such as constant hand washing.
Mood Disorders
Mood disorders include depression and bipolar disorder (or manic depression). Symptoms may include mood swings such as extreme sadness or elation, sleep and eating disturbances and changes in activity and energy levels. Suicide may be a risk with these disorders.
Schizophrenia
Schizophrenia is a serious disorder that affects how a person thinks, feels and acts. Schizophrenia is believed to be caused by chemical imbalances in the brain that produce a variety of symptoms including hallucinations, delusions, withdrawal, incoherent speech and impaired reasoning.
Dementias
This group of disorders includes diseases like Alzheimer’s which leads to loss of mental functions, for example memory loss and a decline in intellectual and physical skills.
Eating Disorders
Anorexia nervosa and bulimia are serious and potentially life-threatening illnesses. People with these disorders have a preoccupation with food and an irrational fear of being fat. Anorexia is self-starvation while bulimia involves cycles of bingeing (consuming large quantities of food) and purging (self-induced vomiting or abusing laxatives). Behavior may also include excessive exercise.