Evidence-Based Supplement & Herb Guides

Referential delusion Overview: Meaning, Examples, and Warning Signs

Referential delusion involves fixed beliefs that ordinary events carry special personal meaning. Learn key symptoms, examples, causes, risk factors, diagnostic context, and warning signs that may require urgent professional evaluation.

A referential delusion is a fixed belief that ordinary events, comments, gestures, media, or coincidences carry a special personal meaning directed at oneself. A...

Recurrent Brief Depression: Symptoms, Signs, Causes, and Complications

Recurrent brief depression involves repeated short depressive episodes that can still cause serious distress, impairment, and safety risks. Learn how symptoms, episode patterns, causes, risk factors, complications, and diagnostic distinctions are understood.

Recurrent brief depression is a pattern of repeated depressive episodes that are short in duration but clinically meaningful. The episodes may last only a...

Reality distortion disorder symptoms and related psychosis signs

A clear guide to reality distortion symptoms, including delusions, hallucinations, causes, risk factors, diagnostic context, complications, and urgent warning signs.

Reality distortion disorder is not a standard diagnosis in major psychiatric classification systems. In clinical language, “reality distortion” usually refers to a pattern of...

Reading Disorder Symptoms, Signs, Causes, and Complications

A clear guide to reading disorder, including dyslexia-related symptoms, early and later signs, brain-based causes, risk factors, co-occurring conditions, diagnostic context, and possible complications.

Reading disorder is a neurodevelopmental condition in which a person has persistent difficulty learning or using reading skills that are expected for their age,...

Reactive psychosis explained: symptoms, triggers, risks, and complications

Learn what reactive psychosis means, how symptoms can appear, what may trigger a brief stress-related psychotic episode, and when urgent evaluation may be needed.

Reactive psychosis is a sudden episode of psychosis that appears in close connection with a major stressor, trauma, or emotionally overwhelming event. The term...

Reactive Attachment Disorder in Children: Symptoms, Causes, and Complications

Learn what reactive attachment disorder means, how symptoms appear in children, what causes and risk factors matter, and when professional evaluation is important.

Reactive attachment disorder is a rare but serious early-childhood mental health condition linked to severe problems in early caregiving. It is not the same...

Rapid cycling bipolar disorder overview and diagnostic context

Rapid cycling bipolar disorder involves four or more manic, hypomanic, depressive, or mixed episodes in one year. Learn the symptoms, signs, risk factors, diagnostic context, and complications that make this bipolar pattern clinically important.

Rapid cycling bipolar disorder is a pattern of bipolar illness in which a person has four or more distinct mood episodes within a 12-month...

Rage disorder Signs, Risk Factors, and Safety Concerns

Learn what rage disorder means, how it relates to intermittent explosive disorder, what symptoms and warning signs look like, and which causes, risk factors, diagnostic distinctions, and complications matter most.

Rage disorder is a common informal way to describe repeated, intense anger outbursts that feel sudden, extreme, and hard to control. In clinical settings,...

Querulous Paranoia Overview and Diagnostic Context

Learn what querulous paranoia means, how it differs from ordinary complaints, what symptoms and warning signs may appear, and why careful professional evaluation can matter.

Querulous paranoia is a clinically described pattern in which a person becomes intensely and persistently preoccupied with a grievance, perceived injustice, or alleged wrongdoing....

Querulant delusion: Signs, Risk Factors, and Diagnostic Context

Learn what querulant delusion means, how it may appear, what it can be confused with, and why fixed grievance beliefs sometimes require careful mental health evaluation.

Querulant delusion is an uncommon but clinically important form of fixed, grievance-centered belief. It is most often discussed under related terms such as querulous...

Psychotic mania: Overview of Manic Episodes With Psychotic Features

Learn what psychotic mania means, how manic and psychotic symptoms can appear together, what conditions may look similar, and when urgent evaluation may be needed.

Psychotic mania is a severe manic state in which the mood, energy, thinking, and behavior changes of mania occur alongside psychosis, such as delusions,...

Psychotic Disorder Overview: Hallucinations, Delusions, Causes, and Complications

Psychotic disorder explained clearly, including symptoms, early warning signs, possible causes, risk factors, diagnostic context, complications, and when urgent evaluation may matter.

A psychotic disorder is a mental health condition in which a person has episodes of psychosis: a disruption in the ability to clearly tell...

Psychotic Depression Symptoms, Signs, Causes, and Complications

Clear overview of psychotic depression, including depressive and psychotic symptoms, warning signs, risk factors, diagnostic context, common look-alike conditions, and serious complications.

Psychotic depression is a severe form of depression in which a person has a major depressive episode along with psychotic symptoms, such as delusions...

Psychosis Symptoms, Early Signs, Causes, and Risk Factors

Psychosis can involve hallucinations, delusions, disorganized thinking, and changes in behavior or insight. Learn what symptoms can look like, what may cause them, which risk factors matter, and when urgent evaluation may be needed.

Psychosis is a mental state in which a person has difficulty telling what is real from what is not. It can affect perception, thinking,...

Psychosexual dysfunction symptoms, causes, risk factors, and diagnostic context

Learn what psychosexual dysfunction means, how symptoms can affect desire, arousal, orgasm, pain, and intimacy, and when persistent or distressing sexual changes may need professional evaluation.

Psychosexual dysfunction refers to persistent or distressing problems with sexual desire, arousal, orgasm, ejaculation, genital pain, or sexual avoidance when psychological, relational, emotional, and...

Psychosexual disorder: Common Symptoms, Causes, and Related Conditions

Psychosexual disorder is an older umbrella term for sexual difficulties shaped by psychological, emotional, relational, or developmental factors. Learn the symptoms, causes, risk factors, diagnostic context, and warning signs that may call for professional evaluation.

Psychosexual disorder is an older umbrella term used to describe sexual difficulties that are strongly influenced by psychological, emotional, relational, or developmental factors. In...

Psychopathy Explained: Symptoms, Signs, Risk Factors, and Effects

Clear, clinically grounded guide to psychopathy, including core traits, signs in relationships and daily life, causes, risk factors, diagnostic context, complications, and when professional evaluation may be important.

Psychopathy is a pattern of personality traits involving persistent callousness, shallow or limited remorse, manipulativeness, emotional detachment, and, in some people, repeated antisocial or...

Psychogenic Non Epileptic Seizures: Symptoms, Risk Factors, and Possible Complications

Learn what psychogenic non epileptic seizures are, how PNES symptoms can look, what signs may suggest functional seizures, and why careful diagnosis matters.

Psychogenic non epileptic seizures, often shortened to PNES, are episodes that look like epileptic seizures but are not caused by the abnormal electrical brain...

Psychogenic fugue symptoms, causes, signs, and diagnostic context

Learn what psychogenic fugue means, how dissociative fugue symptoms appear, what can cause fugue states, what conditions may look similar, and when urgent evaluation matters.

Psychogenic fugue is an older term for what is now most often described as dissociative fugue, a rare form of dissociative amnesia in which...

Psychogenic amnesia: Symptoms, Risk Factors, and Real-Life Effects

Psychogenic amnesia is trauma-linked autobiographical memory loss, now usually called dissociative amnesia. Learn the key symptoms, causes, risk factors, diagnostic context, and complications.

Psychogenic amnesia is memory loss that cannot be explained by ordinary forgetfulness and is most often linked to severe stress, trauma, or overwhelming emotional...