Running amok, sometimes referred to as simply amok or gone amok, also spelled amuk, from the Malay language, is "an episode of sudden mass assault against people or objects usually by a single individual following a period of brooding that has traditionally been regarded as occurring especially in Malay culture but is now increasingly viewed as psychopathological behavior". The syndrome of "Amok" is found in the "Diagnostic and Statistical Manual of Mental Disorders" (DSM-IV TR). The phrase is often used in a less serious manner when describing something that is wildly out of control or causing a frenzy (e.g., a dog tearing up the living room furniture might be termed as "running amok".)

In 1849, amok was officially classified as a psychiatric condition based on numerous reports and case studies that showed the majority of individuals who committed amok were, in some sense, mentally ill. The modern DSM-IV method of classification of mental disorders contains two official types of amok disorder; beramok and amok. Beramok is considered to be the more common of the two and is associated with the depression and sadness resulting from a loss and the subsequent brooding process. Loss includes, but is not limited to, the death of a spouse or loved one, divorce, loss of a job, money, power, etc. Beramok is associated with mental issues of severe depression or other mood disorders. Amok, the rarer form, is believed to stem from rage, insult, or a vendetta against a person, society, or object for a wide variety of reasons. Amok has been more closely associated with psychosis, personality disorders, bipolar disorder, and delusions.

Phobophobia is mainly linked with internal predispositions. It is developed by the unconscious mind which is linked to an event in which phobia was experienced with emotional trauma and stress, which are closely linked to anxiety disorders and by forgetting and recalling the initiating trauma. Phobophobia might develop from other phobias, in which the intense anxiety and panic caused by the phobia might lead to fearing the phobia itself, which triggers phobophobia before actually experiencing the other phobia. The extreme fear towards the other phobia can lead the patient to believe that their condition may develop into something worse, intensifying the effects of the other phobia by fearing it. Also, phobophobia can be developed when anxiety disorders are not treated, creating an extreme predisposition to other phobias. The development of phobophobia can also be attributed to characteristics of the patient itself, such as phylogenetic influence, the prepotency of certain stimuli, individual genetic inheritance, age incidence, sex incidence, personality background, cultural influence inside and outside the family, physiological variables and biochemical factors.

Phobophobia shares the symptoms of many other anxiety disorders, more specifically panic attacks and generalized anxiety disorder:

1. Dizziness

2. Heart pounding

3. An excess of perspiration

4. Slight paresthesia

5. Tension

6. Hyperventilation

7. Angst

8. Faintness

9. Avoidance

When people experience panic attacks, they are convinced that they are about to die or suffer some extreme calamity in which some kind of action is done by the individual (such as fleeing or screaming). In case of phobophobia, a panic attack might be encountered as the fear that they will in fact experience the calamities of the feared phobia and see it as something inevitable. Also, the nature of the panic is of profound personal significance to the individual, on a similar way phobophobia is related to the individual. This is why panic attacks are closely related to phobophobia.

Nevertheless, they can differentiate themselves by the fact that phobophobia is a psychological fear of the phobia itself that intensifies it, while panic attacks are extreme fear of encountering the calamities of an imminent disaster, and in this particular case, of encountering other phobias, which can be often accompanied by the at least four of the following common symptoms of panic attacks:

1. Dyspnea

2. Palpitations

3. Chest pain or discomfort

4. Choking or smothering sensations

5. Vertigo or unsteady feelings

6. Feelings of unreality (depersonalization or derealization)

7. Paresthesias (tingling in hands or feet)

8. Hot and cold flushes

9. Faintness

10. Trembling or shaking

11. Difficult breathing

12. Sweating

Panic attacks can also be accompanied by disturbance in heart action and feelings of desperation and angst. Being closely related, phobophobia and panic attacks, the first one can be treated like a panic attack with psychological therapy. Moreover, in combination with phobophobia, a patient might be more susceptible to believe that their continuing anxiety symptoms will eventually culminate in a much more severe mental disorder, such as schizophrenia.

Brief psychotic disorder is a period of psychosis whose duration is generally shorter, is not always non-recurring, but can be, and is not caused by another condition.

The disorder is characterized by a sudden onset of psychotic symptoms, which may include delusions, hallucinations, disorganized speech or behavior, or catatonic behavior. The symptoms must not be caused by schizophrenia, schizoaffective disorder, delusional disorder or mania in bipolar disorder. They must also not be caused by a drug (such as amphetamines) or medical condition (such as a brain tumor). The term bouffée délirante describes an acute nonaffective and nonschizophrenic psychotic disorder, which is largely similar to DSM-III-R and DSM-IV brief psychotic and schizophreniform disorders.

Symptoms generally last at least a day, but not more than a month, and there is an eventual return to full baseline functioning. It may occur in response to a significant stressor in one's life, or in other situations where a stressor is not apparent, including in the weeks following birth. In diagnosis, a careful distinction is considered for culturally appropriate behaviors, such as religious beliefs and activities. It is believed to be connected to or synonymous with a variety of culture-specific phenomena such as latah, koro, and amok.

There are three forms of brief psychotic disorder:

1. Brief psychotic disorder with a stressor, such as a trauma or death in the family.

2. Brief psychotic disorder without a stressor, there is no obvious stressor.

3. Brief psychotic disorder with postpartum onset. Usually occurs about four weeks after giving birth.