This post was last updated May 4, 2016\nMental illness is a condition that affects a person\u2019s thinking, feeling, and behavior. The mainstream medical community recognizes more than 200 classified types of mental illness.\nThese conditions can alter your ability to relate to other people, work, and attend school, and can prevent you from living a normal life. Different types of mental illness offer different experiences, and symptoms may vary from person-to-person, even when they share the same diagnosis.\nFact: The medical community recognizes more than 200 classified types of #mentalillness. Click To Tweet\nThere are five major categories of mental illnesses:\n\nAnxiety disorders\nMood disorders\nSchizophrenia and psychotic disorders\nDementia\nEating disorders\n\nIt\u2019s important to remember that each condition can vary greatly from person to person.\nStigma and mental illness\nWhen you\u2019re concerned about your mental health or that or that of a loved on, you should talk to a qualified health care provider. Many people with mental illness may feel stigmatized for their condition, but treatment for these disorders has come a long way. Mental illness requires the same need for treatment as many physical ailments.\nRELATED:\u00a0Infographic: 5 Types of Mental Illness\nTypes of Mental Illness\nAnxiety Disorders\nAnxiety disorders affect approximately 40 million American adults age 18 years and older each year.\nAnxiety disorders are a form of mental illness that causes people to experience distressing and frequent bouts of fear and apprehension. Many will experience these feelings when periodically doing things like public speaking or a job interview. Those with anxiety disorders experience these feelings frequently, and for an extended period \u2014\u00a0six months or more.\nIf not treated, these symptoms can worsen and increase, including:\n\nPanic attacks\nPhysical symptoms such as pain, nausea and headaches\nNightmares\nObsessive thoughts\nFear of leaving the house\n\nCommon diagnosis of mental illness, under the category of anxiety disorders, includes:\n\nPanic disorder\nObsessive-compulsive disorder (OCD)\nPost-traumatic stress disorder (PTSD)\nSocial phobia (social anxiety disorder)\nGeneralized anxiety disorder (GAD)\n\nMood Disorders\nEvery one of us has experienced feelings of sadness, irritability, or a general case of the \u201cblahs\u201d at one time or another.\nWhile bad moods are common, and usually pass in a short period, people suffering with mood disorders live with more sustained and severe symptoms and disruption. People living with this mental illness find that their mood impacts both mental and psychological well-being, nearly every day, and often for much of the day.\nIt is estimated that one in 10 adults suffer from some type of mood disorder, with the most common conditions being depression and bipolar disorder. With proper diagnosis and treatment, most of those living with mood disorders lead healthy, normal and productive lives. If left untreated, this illness can affect role functioning, quality of life and many chronic physical health disorders such as diabetes and heart disease.\nSchizophrenia and Psychotic Disorders\nSchizophrenia is a serious brain disorder that is marked by significant changes and disruption in both cognitive and emotional function. Schizophrenia has an effect on the most basic human aspects of life (e.g. language\/communication, train of thought, perception of objects, self and others).\nThe most common symptoms of schizophrenia include:\n\nHearing voices\nHallucinations\nDelusions\nSocial withdrawal\nIncoherent speech\nAbnormal reasoning\n\nDementia\nDementia is distinguished by a disruption of consciousness, as well as changes in cognitive health, such as memory loss and motor skills.\nThe most common forms of dementia include:\n\nAlzheimer\u2019s disease\nHealth conditions (e.g., head trauma, HIV, Parkinson\u2019s); and\nSubstance-induced dementia (e.g. drugs\/alcohol abuse, inhalants, or exposure to toxins).\n\nEating Disorders\nEating disorders are serious, chronic conditions that can be life-threatening, if left untreated. These conditions typically take root during the adolescent years and primarily affect females.\nWhile there are variations in the expression, symptoms, and course of eating disorders, the common thread is that they all involve obsessive and sometimes distressing thoughts and behaviors, including:\n\nReduction of food intake\nOvereating\nFeelings of depression or distress\nConcern of weight, body shape, poor self-image\n\nAt the onset, these disorders begin with the person eating smaller or larger portions than usual. However, over time, urges to decrease or increase the amount of food eaten take hold, and the illness escalates.\u00a0The three most common types of eating disorders are:\n\nAnorexia Nervosa \u2013 self-starvation\nBulimia Nervosa \u2013 binge eating followed by purging, fasting or excessive exercise\nBinge Eating Disorder \u2013 episodes of uncontrolled eating, without the abuse of laxatives or vomiting, associated bulimia\n\nRELATED:\u00a0Identifying and Treating Eating Disorders\nThe National Institute of Mental Health estimates that more than 45 million Americans have a mental illness in any given year, with only about half seeking treatment. While the majority of us will have concerns about our mental well-being from time to time, mental illness is diagnosed when there are ongoing and increasing signs and symptoms begin to cause continual stress and impact our quality of life and our ability to function.\nDid you know more than 45 million Americans have a #mentalillness in a given year? Click To Tweet\nFor more information on mental and behavioral health, please visit our behavioral health website.