Symptoms of mental illness include alcohol or drug abuse, mood disorders, problems with concentration and thinking, and nervousness, according to Mayo Clinic. Hallucinations, delusions, social withdrawal, excessive tired... More » Health Conditions & Diseases Mental Health

According to the National Institute of Mental Health, depression is a mental disorder or illness that can present itself in several forms. The form of depression that a person suffers from depends on genetic, environment... More » Health Conditions & Diseases Mental Health

Howard Hughes is thought to have suffered from obsessive-compulsive disorder and a germ phobia. The billionaire movie producer, aviator and business tycoon became extremely reclusive at the end of his life, likely due to... More »

Symptoms of manic depressive disorder include feelings of worthlessness, fatigue, restlessness and problems with decision making or concentration, states Healthline. Patients with mania may also experience extreme irrita... More » Health Conditions & Diseases Mental Health

According to WebMD, the main causes of depression include physical, sexual or emotional abuse, death of a loved one, serious illness, substance abuse, and family history of depression or mental illness. A major life even... More »

To create a mental health treatment plan, a person should speak to a health care provider to form a plan based on the type of mental illness that needs to be treated, its severity, and the individual's personal needs and... More » Health Conditions & Diseases Mental Health

Common symptoms of mental illness vary depending on the disorder, but include feelings of sadness, difficulty concentrating, extreme worry, and substantial shifts in mood. Signs of mental illness may also include "withdr... More »