Low frustration tolerance (LFT), or "short-term hedonism" is a concept utilized to describe the inability to tolerate unpleasant feelings or stressful situations. It stems from the feeling that reality should be as wished, and that any frustration should be resolved quickly and easily. People with low frustration tolerance experience emotional disturbance when frustrations are not quickly resolved. Behaviors are then directed towards avoiding frustrating events which, paradoxically, leads to increased frustration and even greater mental stress.

In REBT the opposite construct is "high frustration tolerance".

Emotional dysregulation (ED) is a term used in the mental health community to refer to an emotional response that is poorly modulated, and does not fall within the conventionally accepted range of emotive response.

Possible manifestations of emotional dysregulation include angry outbursts or behavior outbursts such as destroying or throwing objects, aggression towards self or others, and threats to kill oneself. These variations usually occur in seconds to minutes or hours. Emotional dysregulation can lead to behavioral problems and can interfere with a person's social interactions and relationships at home, in school, or at place of employment.

Emotional dysregulation can be associated with an experience of early psychological trauma, brain injury, or chronic maltreatment (such as child abuse, child neglect, or institutional neglect/abuse), and associated disorders such as reactive attachment disorder. Emotional dysregulation may present in people with psychiatric disorders such as attention deficit hyperactivity disorder, bipolar disorder, borderline personality disorder, narcissistic personality disorder, and complex post-traumatic stress disorder. ED is also found among those with autism spectrum disorders. In such cases as borderline personality disorder, hypersensitivity to emotional stimuli causes a slower return to a normal emotional state. This is manifested biologically by deficits in the frontal cortices of the brain.

The fear of crime refers to the fear of being a victim of crime as opposed to the actual probability of being a victim of crime.

The fear of crime, along with fear of the streets and the fear of youth, is said to have been in Western culture for "time immemorial". While fear of crime can be differentiated into public feelings, thoughts and behaviors about the personal risk of criminal victimization, distinctions can also be made between the tendency to see situations as fearful, the actual experience while in those situations, and broader expressions about the cultural and social significance of crime and symbols of crime in people's neighborhoods and in their daily, symbolic lives.

Importantly, feelings, thoughts and behaviors can have a number of functional and dysfunctional effects on individual and group life, depending on actual risk and people's subjective approaches to danger. On a negative side, they can erode public health and psychological well-being; they can alter routine activities and habits; they can contribute to some places turning into 'no-go' areas via a withdrawal from community; and they can drain community cohesion, trust and neighborhood stability. Some degree of emotional response can be healthy: psychologists have long highlighted the fact that some degree of worry can be a problem-solving activity, motivating care and precaution, underlining the distinction between low-level anxieties that motivate caution and counter-productive worries that damage well-being.

Factors influencing the fear of crime include the psychology of risk perception, circulating representations of the risk of victimization (chiefly via interpersonal communication and the mass media), public perceptions of neighborhood stability and breakdown, the influence of neighbourhood context, and broader factors where anxieties about crime express anxieties about the pace and direction of social change. There are also some wider cultural influences. For example, some have argued that modern times have left people especially sensitive to issues of safety and insecurity.

Early experiences with caregivers can lead to differences in emotional regulation. The responsiveness of a caregiver to an infant's signals can help an infant regulate their emotional systems. Caregiver interaction styles that overwhelm a child or that are unpredictable may undermine emotional regulation development. Effective strategies involve working with a child to support developing self-control such as modeling a desired behavior rather than demanding it.

The richness of environment that a child is exposed to helps development of emotional regulation. An environment must provide appropriate levels of freedom and constraint. The environment must allow opportunities for a child to practice self-regulation. An environment with opportunities to practice social skills without over-stimulation or excessive frustration helps a child develop self-regulation skills.

Impulsive behavior, and especially impulsive violence predisposition has been correlated to a low brain serotonin turnover rate, indicated by a low concentration of 5-hydroxyindoleacetic acid (5-HIAA) in the cerebrospinal fluid (CSF). This substrate appears to act on the suprachiasmatic nucleus in the hypothalamus, which is the target for serotonergic output from the dorsal and median raphe nuclei playing a role in maintaining the circadian rhythm and regulation of blood sugar. A tendency towards low 5-HIAA may be hereditary. A putative hereditary component to low CSF 5-HIAA and concordantly possibly to impulsive violence has been proposed. Other traits that correlate with IED are low vagal tone and increased insulin secretion. A suggested explanation for IED is a polymorphism of the gene for tryptophan hydroxylase, which produces a serotonin precursor; this genotype is found more commonly in individuals with impulsive behavior.

IED may also be associated with lesions in the prefrontal cortex, with damage to these areas, including the amygdala, increasing the incidence of impulsive and aggressive behavior and the inability to predict the outcomes of an individual's own actions. Lesions in these areas are also associated with improper blood sugar control, leading to decreased brain function in these areas, which are associated with planning and decision making. A national sample in the United States estimated that 16 million Americans may fit the criteria for IED.

The frustration discomfort scale (FDS), a multidimensional measure for LFT, was developed using REBT theories.

These dimensions were labelled in four categories:

1. Emotional intolerance, involving intolerance of emotional distress.

2. Entitlement, involving intolerance of unfairness and frustrated gratification.

3. Discomfort intolerance, involving intolerance of difficulties and hassles.

4. Achievement, involving intolerance of frustrated achievement goals.

Another theory suggests a possible relationship between histrionic personality disorder and antisocial personality disorder. Research has found 2/3 of patients diagnosed with histrionic personality disorder also meet criteria similar to those of the antisocial personality disorder, which suggests both disorders based towards sex-type expressions may have the same underlying cause. Women are hypersexualized in the media consistently, ingraining thoughts that the only way women are to get attention is by exploiting themselves, and when seductiveness isn't enough, theatricals are the next step in achieving attention. Men can just as well be flirtatious towards multiple women yet feel no empathy or sense of compassion towards them. They may also become the center of attention by exhibiting the "Don Juan" macho figure as a role-play.

Some family history studies have found that histrionic personality disorder, as well as borderline and antisocial personality disorders, tend to run in families, but it is unclear if this is due to genetic or environmental factors. Both examples suggest that predisposition could be a factor as to why certain people are diagnosed with histrionic personality disorder, however little is known about whether or not the disorder is influenced by any biological compound or is genetically inheritable. Little research has been conducted to determine the biological sources, if any, of this disorder.

Philophobia: The fear of falling in love or emotional attachment. The risk is usually when a person has confronted any emotional turmoil relating to love but also can be chronic phobia. This affects the quality of life and pushes a person away from commitment. The worst aspect of fear of being in love and falling in love is that it keeps a person in solitude. It can also evolve out of religious and cultural beliefs that prohibit love.It represents certain guilt and frustration towards the reaction coming from inside.

Two epidemiological studies of community samples approximated the lifetime prevalence of IED to be 4–6%, depending on the criteria set used. A Ukrainian study found comparable rates of lifetime IED (4.2%), suggesting that a lifetime prevalence of IED of 4–6% is not limited to American samples. One-month and one-year point prevalences of IED in these studies were reported as 2.0% and 2.7%, respectively. Extrapolating to the national level, 16.2 million Americans would have IED during their lifetimes and as many as 10.5 million in any year and 6 million in any month.

Among a "clinical" population, a 2005 study found the lifetime prevalence of IED to be 6.3%.

Prevalence appears to be higher in men than in women.

Of US subjects with IED, 67.8% had engaged in direct interpersonal aggression, 20.9% in threatened interpersonal aggression, and 11.4% in aggression against objects. Subjects reported engaging in 27.8 high-severity aggressive acts during their worst year, with 2–3 outbursts requiring medical attention. Across the lifespan, the mean value of property damage due to aggressive outbursts was $1603.

A study in the March 2016 "Journal of Clinical Psychiatry" suggests a relationship between infection with the parasite "Toxoplasma gondii" and psychiatric aggression such as IED.

Stir crazy is a phrase that dates to 1908 according to the Oxford English Dictionary and the online Etymology Dictionary. Used among inmates in prison, it referred to a prisoner who became mentally unbalanced because of prolonged incarceration. The term "stir crazy" is based upon the slang "stir" (1851) to mean prison. It is now used to refer to anyone who becomes restless or anxious from feeling trapped and even somewhat claustrophobic in an environment perceived to be more static and unengaging than they can any longer continue to hold interest, meaning, and value to and for them.

"Stir crazy" could be classified as a more specific form of boredom, but combined with elevated and often increasing levels of anxiety, frustration, agitation, fidgeting, bipolar type mood swings, and accessory episodes of acting out impulsively or otherwise antisocially on those feelings, the longer the unengaging non-stimulating environment is persisted in.

Approximately 1–3% of the general population may be diagnosed with HPD. Major character traits may be inherited, while other traits may be due to a combination of genetics and environment, including childhood experiences. This personality is seen more often in women than in men. It has typically been found that at least two thirds of persons with HPD are female, however there have been a few exceptions. Whether or not the rate will be significantly higher than the rate of women within a particular clinical setting depends upon many factors that are mostly independent of the differential sex prevalence for HPD. Those with HPD are more likely to look for multiple people for attention which leads to marital problems due to jealousy and lack of trust from the other party. This makes them more likely to become divorced or separated once married.

Passive–aggressive disorder may stem from a specific childhood stimulus (e.g., alcohol/drug addicted parents, bullying, abuse) in an environment where it was not safe to express frustration or anger. Families in which the honest expression of feelings is forbidden tend to teach children to repress and deny their feelings and to use other channels to express their frustration. For example, if physical and psychological punishment were to be dealt to children who express anger, they would be inclined to be passive aggressive.

Children who sugarcoat hostility may have difficulties being assertive, never developing better coping strategies or skills for self-expression. They can become adults who, beneath a "seductive veneer," harbor "vindictive intent," in the words of US congressman/psychologist Timothy F. Murphy, and writer/practicing therapist Loriann Oberlin. Alternatively individuals may simply have difficulty being as directly aggressive or assertive as others. Martin Kantor suggests three areas that contribute to Passive–aggressive anger in individuals: conflicts about dependency, control, and competition, and that a person may be termed Passive–aggressive if they behave so to few people on most occasions.

Murphy and Oberlin also see passive aggression as part of a larger umbrella of hidden anger stemming from ten traits of the angry child or adult. These traits include making one's own misery, the inability to analyze problems, blaming others, turning bad feelings into angry ones, attacking people, lacking empathy, using anger to gain power, confusing anger with self-esteem, and indulging in negative self-talk. Lastly, the authors point out that those who hide their anger can be nice when they wish to be.

The Diagnostic and Statistical Manual of Mental Disorders revision IV (DSM-IV) describes passive–aggressive personality disorder as a "pervasive pattern of negativistic attitudes and passive resistance to demands for adequate performance in social and occupational situations."

Passive-aggressive behavior is the obligatory symptom of the passive–aggressive personality disorder. Persons with passive–aggressive personality disorder are characterized by procrastination, covert obstructionism, inefficiency and stubbornness.

Emotional and behavioral disorders (EBD; sometimes called emotional disturbance or serious emotional disturbance) refer to a disability classification used in educational settings that allows educational institutions to provide special education and related services to students that have poor social or academic adjustment that cannot be better explained by biological abnormalities or a developmental disability.

The classification is often given to students that need individualized behavior supports to receive a free and appropriate public education, but would not be eligible for an individualized education program under another disability category of the Individuals with Disabilities Education Act (IDEA).

The IDEA requires that a student must exhibit one or more of the following characteristics over a long duration, and to a marked degree that adversely affects their educational performance, to receive an EBD classification:

- Difficulty to learn that cannot be explained by intellectual, sensory, or health factors.

- Difficulty to build or maintain satisfactory interpersonal relationships with peers and teachers.

- Inappropriate types of behavior (acting out against self or others) or feelings (expresses the need to harm self or others, low self-worth, etc.) under normal circumstances.

- A general pervasive mood of unhappiness or depression.

- A tendency to develop physical symptoms or fears associated with personal or school problems.

The term "EBD" includes students diagnosed with schizophrenia, but does not apply to students who are "socially maladjusted", unless it is determined that they also meet the criteria for an EBD classification.

The core aspect of fear of crime is the range of emotions that is provoked in citizens by the possibility of victimization. While people may feel angry and outraged about the extent and prospect of crime, surveys typically ask people "who they are afraid of" and "how worried they are". Underlying the answers that people give are (more often than not) two dimensions of 'fear': (a) those everyday moments of worry that transpire when one feels personally threatened; and (b) some more diffuse or 'ambient' anxiety about risk. While standard measures of worry about crime regularly show between 30% and 50% of the population of England and Wales express some kind of worry about falling victim, probing reveals that few individuals actually worry for their own safety on an everyday basis. One thus can distinguish between fear (an emotion, a feeling of alarm or dread caused by an awareness or expectation of danger) and some broader anxiety. However it should be noted that some people may be more willing to admit their worries and vulnerabilities than others.

Mystical psychosis is a term coined by Arthur J. Deikman in the early 1970s to characterize first-person accounts of psychotic experiences that are strikingly similar to reports of mystical experiences. According to Deikman, and authors from a number of disciplines, psychotic experience need not be considered pathological, especially if consideration is given to the values and beliefs of the individual concerned. Deikman thought the mystical experience was brought about through a "deautomatization" or undoing of habitual psychological structures that organize, limit, select, and interpret perceptual stimuli. There may be several causes of deautomatization—exposure to severe stress, substance abuse or withdrawal, and mood disorders.

A first episode of mystical psychosis is often very frightening, confusing and distressing, particularly because it is an unfamiliar experience. For example, researchers have found that people experiencing paranormal and mystical phenomena report many of the symptoms of panic attacks.

On the basis of comparison of mystical experience and psychotic experience Deikman came to a conclusion that mystical experience can be caused by "deautomatization" or transformation of habitual psychological structures which organize, limit, select and interpret perceptional incentives that is interfaced to heavy stresses and emotional shocks. He described usual symptoms of mystical psychosis which consist in strengthening of a receptive mode and weakening of a mode of action.

People susceptible to mystical psychosis become much more impressible. They feel a unification with society, with the world, God, and also feel washing out the perceptive and conceptual borders. Similarity of mystical psychosis to mystical experience is expressed in sudden, distinct and very strong transition to a receptive mode. It is characterized with easing the subject—object distinction, sensitivity increase and nonverbal, lateral, intuitive thought processes.

Deikman's opinion that experience of mystical experience in itself can't be a sign to psychopathology, even in case of this experience at the persons susceptible to neurophysiological and psychiatric frustration, in many respects defined the relation to mystical experiences in modern psychology and psychiatry.

Deikman considered that all-encompassing unity opened in mysticism can be all-encompassing unity of reality.

DES often occurs with other disorders, which is known as comorbidity. Many studies have examined the presence of DES in patients with schizophrenia. Results of schizophrenic patients on the "Behavioural Assessment of the Dysexecutive Syndrome (BADS)" test (discussed below) are comparable to brain injured patients. Further, results of BADS have been shown to correlate with phases of schizophrenia. Patients in the chronic phase of the disorder have significantly lower scores than those who are acute. This is logical due to the similarities in executive disruptions that make everyday life difficult for those with schizophrenia and symptoms that form DES.

Patients with Alzheimer's disease have been shown to exhibit impairment in executive functioning as well. The effects of DES symptoms on the executive functions and working memory, such as attentiveness, planning and remembering recently learned things, are some of the earliest indicators of Alzheimer's.

Studies have also indicated that chronic alcoholism (see Korsakoff's syndrome) can lead to a mild form of DES according to results of BADS.

The most frequent cause of the syndrome is brain damage to the frontal lobe. Brain damage leading to the dysexecutive pattern of symptoms can result from physical trauma such as a blow to the head or a stroke or other internal trauma.

It is important to note that frontal lobe damage is not the only cause of the syndrome. It has been shown that damage, such as lesions, in other areas of the brain may indirectly affect executive functions and lead to similar symptoms. There is not one specific pattern of damage that leads to DES, as multiple affected brain structures and locations have led to the symptoms. This is one reason why the term frontal lobe syndrome is not preferred.

According to one hypothesis, "POIS is caused by Type-I and Type-IV allergy to the males' own semen". Specifically,

POIS could also be caused by an auto-immune reaction not to semen itself, but to another substance that is released during ejaculation, such as to cytokines.

The allergy hypothesis has been disputed. According to one study, "IgE-mediated semen allergy in men may not be the potential mechanism of POIS".

The cause of POIS is unknown. Some doctors hypothesize that POIS is caused by an auto-immune reaction. Other doctors suspect a hormone imbalance as the cause. While other causes have been proposed as well, none of the proposed causes seem to fully explain the disease.

There are approximately 976 million smokers in the world. Estimates are that half of smokers (and one-third of former smokers) are dependent based on DSM criteria, regardless of age, gender or country of origin, but this could be higher if different definitions of dependence were used. Recent data suggest that, in the United States, the rates of daily smoking and the number of cigarettes smoked per day are declining, suggesting a reduction in population-wide dependence among current smokers. However, there are different groups of people who are more likely to smoke than the average population, such as those with low education or low socio-economic status and those with mental illness. There is also evidence that among smokers, some subgroups may be more dependent than other groups. Men smoke at higher rates than do women and score higher on dependence indices; however, women may be less likely to be successful in quitting, suggesting that women may be more dependent by that criterion. Higher nicotine dependence has also been linked with mental illness, including anxiety and depression.

Malignant narcissism is a psychological syndrome comprising an extreme mix of narcissism, antisocial behavior, aggression, and sadism. Often grandiose, and always ready to raise hostility levels, the malignant narcissist undermines organizations in which they are involved, and dehumanizes the people with whom they associate.

Malignant narcissism is a hypothetical, experimental diagnostic category. Narcissistic personality disorder is found in the "Diagnostic and Statistical Manual of Mental Disorders" (DSM-IV-TR), while malignant narcissism is not. As a hypothetical syndrome, malignant narcissism could include aspects of narcissistic personality disorder as well as paranoia. The importance of malignant narcissism and of projection as a defense mechanism has been confirmed in paranoia, as well as "the patient's vulnerability to malignant narcissistic regression".

While narcissists are common, malignant narcissists are less common. A notable difference between the two is the feature of sadism, or the gratuitous enjoyment of the pain of others. A narcissist will deliberately damage other people in pursuit of their own selfish desires, but may regret and will in some circumstances show remorse for doing so, while a malignant narcissist will harm others and enjoy doing so, showing little empathy or regret for the damage they have caused.

About 12% of American adults have had an alcohol dependence problem at some time in their life. In the UK the NHS estimates that around 9% of men and 4% of UK women show signs of alcohol dependence.