Mental illness, also called mental health disorders, refers to a wide range of mental health conditions — disorders that affect your mood, thinking and behavior. Examples of mental illness include depression, anxiety disorders, schizophrenia, eating disorders and addictive behaviors.
Many people have mental health concerns from time to time. But a mental health concern becomes a mental illness when ongoing signs and symptoms cause frequent stress and affect your ability to function.
A mental illness can make you miserable and can cause problems in your daily life, such as at school or work or in relationships. In most cases, symptoms can be managed with a combination of medications and talk therapy (psychotherapy).
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Symptoms
Signs and symptoms of mental illness can vary, depending on the disorder, circumstances and other factors. Mental illness symptoms can affect emotions, thoughts and behaviors.
Examples of signs and symptoms include:
- Feeling sad or down
- Confused thinking or reduced ability to concentrate
- Excessive fears or worries, or extreme feelings of guilt
- Extreme mood changes of highs and lows
- Withdrawal from friends and activities
- Significant tiredness, low energy or problems sleeping
- Detachment from reality (delusions), paranoia or hallucinations
- Inability to cope with daily problems or stress
- Trouble understanding and relating to situations and to people
- Problems with alcohol or drug use
- Major changes in eating habits
- Sex drive changes
- Excessive anger, hostility or violence
- Suicidal thinking
Sometimes symptoms of a mental health disorder appear as physical problems, such as stomach pain, back pain, headaches, or other unexplained aches and pains.
When to see a doctor
If you have any signs or symptoms of a mental illness, see your primary care provider or a mental health professional. Most mental illnesses don't improve on their own, and if untreated, a mental illness may get worse over time and cause serious problems.
If you have suicidal thoughts
Suicidal thoughts and behavior are common with some mental illnesses. If you think you may hurt yourself or attempt suicide, get help right away:
- Call 911 or your local emergency number immediately.
- Call your mental health specialist.
- Contact a suicide hotline. In the U.S., call or text 988 to reach the 988 Suicide & Crisis Lifeline, available 24 hours a day, seven days a week. Or use the Lifeline Chat. Services are free and confidential.
- Seek help from your primary care provider.
- Reach out to a close friend or loved one.
- Contact a minister, spiritual leader or someone else in your faith community.
Suicidal thinking doesn't get better on its own — so get help.
Helping a loved one
If your loved one shows signs of mental illness, have an open and honest discussion with him or her about your concerns. You may not be able to force someone to get professional care, but you can offer encouragement and support. You can also help your loved one find a qualified mental health professional and make an appointment. You may even be able to go along to the appointment.
If your loved one has done self-harm or is considering doing so, take the person to the hospital or call for emergency help.
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About Mental Health
Diagnosis
Mental health conditions are treatable and improvement is possible. Many people with mental health conditions return to full functioning. Some mental illness is preventable.
It is not always clear when a problem with mood or thinking has become serious enough to be a mental health concern. Sometimes, for example, a low or depressed mood is normal, such as when a person experiences the loss of a loved one. But if that depressed mood continues to cause distress or gets in the way of normal functioning, the person may benefit from professional care. Family or friends may recognize changes or problems that a person doesn’t see in themselves.
Some mental illnesses can be related to or mimic a medical condition. For example, depressive symptoms can relate to a thyroid condition. Therefore, a mental health diagnosis often involves a full health evaluation including a physical exam. This may include blood work and/or neurological tests.
People of diverse cultures and backgrounds may express mental health conditions differently. For example, some are more likely to come to a health care professional with concerns about physical symptoms that are caused by a mental health condition. Some cultures view and describe mental health conditions in different ways from most doctors in the U.S.
Stigma around mental illness and treatment prevents many people from seeking needed treatment.
Treatment & Self-help
The diagnosis of a mental disorder is not the same as a need for treatment. Need for treatment takes into consideration how severe the symptoms are, how much symptoms cause distress and affect daily living, the risks and benefits of available treatments and other factors (for example, psychiatric symptoms complicating other illnesses).
Mental health treatment is based upon an individualized plan developed collaboratively with a mental health clinician and an individual (and family members if the individual desires). It may include psychotherapy (talk therapy), medication or other treatments. Often a combination of therapy and medication is most effective. Complementary and alternative therapies are also increasingly being used.
Self-help and support can be very important to an individual’s coping, recovery and well-being. Lifestyle changes, such as good nutrition, exercise, and adequate sleep with good sleep hygiene can support mental health and recovery. A comprehensive treatment plan may include individual actions (for example, lifestyle changes, support groups or exercise) that enhance recovery and well-being.
Primary care clinicians, psychiatrists and other mental health clinicians help individuals and families understand mental illnesses and what they can do to control or cope with symptoms in order to improve health, wellness and function.
Note
* Serious mental illness is a mental, behavioral or emotional disorder (excluding developmental and substance use disorders) resulting in serious functional impairment, which substantially interferes with or limits one or more major life activities. Examples of serious mental illness include major depressive disorder, schizophrenia and bipolar disorder.