Mental health: Definition, common disorders, early signs, and more – Medical News Today

Mental health is about how people think, feel, and behave. Mental health care professionals can help people manage conditions such as depression, anxiety, bipolar disorder, addiction, and other disorders that affect their thoughts, feelings, and behaviors.
Mental health can affect a person’s day-to-day life, relationships, and physical health. External factors in people’s lives and relationships can also contribute to their mental well-being.
Looking after one’s mental health can help a person maintain their ability to enjoy life. This involves balancing their activities, responsibilities, and efforts to achieve psychological resilience.
Stress, depression, and anxiety can affect mental health and may disrupt a person’s routine.
Although healthcare professionals often use the term “mental health,” doctors recognize that many mental health conditions have physical roots.
This article explains what mental health and mental health conditions mean. It also describes the most common types of mental health disorders, including their early signs and how to treat them.
According to the World Health Organization (WHO):
“Mental health is a state of mental well-being that enables people to cope with the stresses of life, realize their abilities, learn well and work well, and contribute to their community.”
The WHO states that mental health is “more than the absence of mental disorders.” Peak mental health is about managing active conditions and maintaining wellness and happiness.
The organization also emphasizes that preserving and restoring mental health is important at individual, community, and societal levels.
In the United States, the National Alliance on Mental Illness estimates that almost 1 in 5 adults experience mental health problems each year.
In 2021, an estimated 14.1 million adults in the U.S., about 5.5% of the adult population, had a serious psychological condition, according to the National Institute of Mental Health (NIMH).
Everyone is at some risk of developing a mental health disorder, regardless of age, sex, income, or ethnicity. In the U.S. and much of the developed world, depression is one of the leading causes of disability.
Social and financial circumstances, adverse childhood experiences, biological factors, and underlying medical conditions can all shape a person’s mental well-being.
Many people with a mental health disorder have more than one condition at the same time.
It is important to note that mental well-being depends on a balance of factors, and several elements may contribute to the development of a mental health disorder.
The following factors can contribute to mental health conditions.
Having limited financial means or belonging to a marginalized ethnic group can increase the risk of mental health disorders as a result of biases in healthcare.
A 2015 Iranian study describes several socioeconomic causes of mental health conditions, including poverty and living on the outskirts of a large city.
The researchers also described flexible (modifiable) and inflexible (nonmodifiable) factors that can affect the availability and quality of mental health care treatment for certain groups.
Modifiable factors for mental health disorders include:
Nonmodifiable factors include:
The researchers found that being female increased the risk of low mental health status by nearly four times. People with a “weak economic status” scored highest for mental health conditions in this study.
Several studies report that childhood traumas such as child abuse, parental loss, parental separation, and parental illness significantly affect a growing child’s mental and physical health.
There are associations between childhood abuse and other adverse events and mental health disorders. These experiences also make people vulnerable to post-traumatic stress disorder (PTSD).
The NIMH suggests that a person’s family history can increase the likelihood of mental health conditions, as specific genes and gene variants put a person at higher risk. However, having a gene associated with a mental health disorder does not guarantee that a condition will develop.
Likewise, people without related genes or a family history of mental health conditions may have a mental health disorder.
Chronic stress and mental health disorders such as depression and anxiety may develop due to underlying physical health problems, such as cancer, diabetes, and chronic pain.
Visit our dedicated hub for more research-backed information and resources on mental health and well-being.
Healthcare professionals group mental health disorders according to the features they have in common. They include:
According to the Anxiety and Depression Association of America, anxiety disorders are the most common mental health disorders.
People with these conditions have severe fear or anxiety related to certain objects or situations. Most people with an anxiety disorder try to avoid exposure to whatever triggers their anxiety.
Below are some examples of anxiety disorders.
Generalized anxiety disorder (GAD) involves excessive worry or fear that disrupts everyday living.
People may also experience physical symptoms, including:
Anxiety symptoms do not always have a specific trigger in people with GAD.
They may experience excessive anxiety when encountering everyday situations that do not pose a direct danger, such as chores or appointments. A person with GAD may sometimes feel anxiety with no trigger at all.
People with panic disorder experience regular panic attacks involving sudden, overwhelming terror or a sense of imminent disaster and death.
There are many types of phobias, and what may seem typical to one person might be a severe problem that dominates daily life for another. Different types include:
People with obsessive-compulsive disorder (OCD) may experience constant, stressful thoughts and an urge to perform repetitive acts, such as handwashing.
PTSD can occur after a person experiences or witnesses a stressful or traumatic event. During this type of event, the person thinks their life or other people’s lives are in danger. They may feel afraid or that they have no control over what is happening.
These sensations of trauma and fear may then contribute to PTSD.
People may also refer to mood disorders as affective disorders or depressive disorders.
People with these conditions have significant mood changes, generally involving either mania, a period of high energy and joy, or depression. Examples of mood disorders include:
Read more about the different types of bipolar disorder.
The term “schizophrenia” often refers to a spectrum of disorders characterized by features of psychosis and other severe symptoms. These are highly complex conditions.
According to the NIMH, signs of schizophrenia typically develop between the ages of 16 and 30. A person will have thoughts that appear fragmented, and may also find it hard to process information.
Schizophrenia has negative and positive symptoms. Positive symptoms include delusions, thought disorders, and hallucinations, while withdrawal, lack of motivation, and a flat or inappropriate mood are examples of negative symptoms.
No physical test or scan reliably indicates whether a person has developed a mental health condition. However, people should look out for the following as possible signs:
Diagnosing a mental health disorder requires a multistep process. A doctor may begin by looking at a person’s medical history and performing a thorough physical exam to rule out a physical condition that may be causing the symptoms. They may also order laboratory tests, such as imaging exams and bloodwork, to screen for possible underlying causes.
The healthcare professional will also do a psychological evaluation. This includes asking about a person’s symptoms and experiences and how these affect the individual’s life. The doctor may ask a person to complete mental health questionnaires to help understand their thoughts, feelings, and behavior patterns.
Most mental health care professionals use the American Psychiatric Association’s (APA) Diagnostic and Statistical Manual of Mental Disorders, 5th edition, text revision (DSM-5-TR) to make a diagnosis. The DSM-5-TR contains descriptions and specific criteria for a diagnosis.
Various methods are available to help manage mental health conditions. Treatment is highly individual, and what works for one person may not work for another.
Some strategies or treatments are more successful in combination with others. A person with a mental health disorder may choose different options at various stages in their life.
It is important for an individual to work closely with a doctor who can help them identify their needs and provide suitable treatment.
Below are some treatment options for people with mental health conditions.
The following types of therapy take a psychological approach to treating mental health:
Psychiatrists, psychologists, psychotherapists, and some primary care physicians carry out these treatments.
Therapy may help individuals to understand the cause of their mental health condition. Working with a healthcare professional may help people manage their day-to-day living and reduce any risk of isolation and self-harm.
Read more about psychotherapy.
Some people take prescribed medications, such as antidepressants, antipsychotics, and drugs for anxiety.
Although these medications cannot cure mental health disorders, some can help improve symptoms. They may also help a person to manage their social interactions and routines.
Some medications boost the body’s absorption of feel-good chemicals, such as serotonin, from the brain. Other drugs either boost the levels of these chemicals or help prevent their degradation or destruction.
A person coping with a mental health condition may decide to make certain lifestyle changes to help them manage their well-being.
Changes may include:
A support network, whether through self-help groups or close friends and family, can be helpful to a person’s well-being.
There are several commonly held misconceptions about mental health. Here are some examples:
Read more about mental health myths.
If you know someone at immediate risk of self-harm, suicide, or hurting another person:
If you or someone you know is having thoughts of suicide, a prevention hotline can help. The 988 Suicide and Crisis Lifeline is available 24 hours a day at 988. During a crisis, people who are hard of hearing can use their preferred relay service or dial 711 then 988.
Find more links and local resources.
While mental health disorders are common, they vary in severity. Many people can manage their symptoms and lead full lives with treatment and access to support.
For others, recovery may include learning new ways to help manage their lives.
The prevalence of mental health disorders tends to peak in people ages 18–25 but drops significantly among people ages 50 and over.
Having a mental health condition, especially depression, is associated with severe chronic health conditions such as diabetes, stroke, cardiovascular disease, and Alzheimer’s disease.
According to the NIMH, the following steps can help a person manage their mental health by reducing their risk of illness, increasing energy levels, and controlling stress:
The term “mental health” refers to a person’s cognitive, behavioral, and emotional well-being. It affects how people react to stressors, engage with others, and make choices.
According to the WHO, peak mental health is more than the absence of mental health problems. It is the ability to manage existing conditions and stressors while maintaining ongoing wellness and happiness.
Factors such as stress, depression, and anxiety can negatively affect a person’s mental health and disrupt their routine.
A healthcare professional may help someone with a mental health condition to manage their well-being through a program of therapy or medications.
Read this article in Spanish.
Last medically reviewed on January 26, 2024
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