The exact causes of mental disorders are not fully understood, but the main causes are physical, psychological, and environmental factors. Physical factors are abnormalities in the body that occur due to physical damage. Brain damage, exposure to toxins, prenatal damage, poor nutrition, and genetic factors are just some of the examples of physical damage that can cause mental illness. Psychological issues are feelings or emotional stressors in life such as feelings of anxiety or loneliness. Environmental conditions that influence mental illness are unmanageable changes such as death or divorce, social and cultural expectations, and substance abuse.
