Evidence-Based Supplement & Herb Guides

Paraphilic Disorder Signs, Types, and Clinical Meaning

Paraphilic disorder involves persistent atypical sexual arousal that causes distress, impairment, nonconsent, or harm risk. Learn the signs, types, causes, risks, complications, and when evaluation matters.

Paraphilic disorder is a mental health diagnosis involving a persistent pattern of atypical sexual arousal that causes significant distress, impairs daily functioning, involves a...

Paranoid schizophrenia Signs, Risk Factors, and Possible Complications

Clear overview of paranoid schizophrenia, including what the term means today, key symptoms and signs, possible causes and risk factors, diagnostic context, complications, and urgent warning signs.

Paranoid schizophrenia is a term many people still use to describe schizophrenia when paranoia, persecutory beliefs, suspiciousness, or threatening hallucinations are prominent. In modern...

Paranoid Personality Disorder: Overview, Symptoms, Causes, and Complications

Learn what paranoid personality disorder is, how its symptoms appear in daily life, what causes and risk factors may contribute, what it is often confused with, and when professional evaluation may matter.

Paranoid personality disorder is a long-term mental health condition marked by persistent distrust and suspicion of other people. A person with this pattern may...

Paranoid delusion Symptoms, Signs, Causes, and Complications

Paranoid delusions can involve fixed beliefs about being harmed, watched, betrayed, or targeted. Learn the key symptoms, signs, possible causes, risk factors, diagnostic context, and complications that may require urgent evaluation.

A paranoid delusion is a strongly held false belief that someone or something intends to harm, threaten, spy on, deceive, or conspire against a...

Paranoia Symptoms, Signs, Causes, and Risk Factors

Paranoia can range from suspicious thoughts to fixed persecutory beliefs. Learn the key symptoms, possible causes, risk factors, complications, and how clinicians evaluate it.

Paranoia is a pattern of mistrust or suspicion in which a person feels that others may be trying to harm, deceive, watch, judge, exploit,...

Panic Disorder Overview: Symptoms, Causes, Diagnosis, and Complications

Panic disorder causes sudden, intense panic attacks and ongoing fear of future episodes. Learn the key symptoms, signs, causes, risk factors, complications, and when evaluation may be important.

Panic disorder can make ordinary moments feel physically dangerous. A person may be sitting at home, walking through a store, driving, or waking from...

Overthinking Disorder Signs, Symptoms, Causes, and Complications

Understand what people often mean by “overthinking disorder,” including symptoms, signs, causes, risk factors, diagnostic context, and when repetitive thinking may signal a mental health concern.

Many people describe themselves as “overthinkers,” but the phrase can mean very different things. For one person, it may mean carefully weighing a difficult...

Oversexuality Disorder Risk Factors, Effects, and Diagnostic Context

Learn what oversexuality disorder means today, how compulsive sexual behavior differs from high libido, which symptoms and risk factors matter, and when evaluation may be important.

Sexual thoughts, urges, and behavior vary widely from person to person. A high sex drive, frequent masturbation, pornography use, or strong interest in sex...

Overeating Disorder: Causes, Warning Signs, and Health Effects

Overeating disorder symptoms can reflect binge eating disorder or another eating-related condition. Learn the signs, causes, risk factors, diagnostic context, and possible complications.

Overeating can happen occasionally in ordinary life, especially during holidays, stress, disrupted routines, or periods of strong hunger. An overeating disorder is different. The...

Overcontrol Disorder Explained: Symptoms, Causes, Risks, and When Evaluation Matters

Learn what overcontrol disorder means, how it differs from OCD, OCPD, anxiety, and autism, and when rigid self-control may warrant professional evaluation.

Overcontrol describes a pattern in which self-control, restraint, perfectionism, and rule-following become so rigid that they interfere with emotional expression, relationships, flexibility, and daily...

Overcompensation Disorder Causes, Triggers, and Related Conditions

Learn what overcompensation disorder means, why it is not a formal diagnosis, how symptoms and signs can appear, and when professional mental health evaluation may be important.

Overcompensation disorder is not a formal diagnosis in major psychiatric classification systems. The phrase is usually used to describe a persistent pattern in which...

Overanxious Disorder Overview, Symptoms, and Risk Factors

Learn what overanxious disorder means today, how it relates to childhood anxiety, which symptoms and signs may appear, and when professional evaluation matters.

Overanxious disorder is an older diagnostic term most often used to describe persistent, excessive worry in children. It is not a current stand-alone diagnosis...

Overanxious Disorder of Childhood Symptoms, Signs, and Diagnostic Context

Learn what overanxious disorder of childhood means today, how symptoms appear in children, what can mimic it, and when professional or urgent evaluation may matter.

Some children worry more intensely, more often, and about more areas of life than their peers. When this pattern becomes persistent, difficult to control,...

Outburst Disorder: Causes, Triggers, Risk Factors, and Complications

Learn what outburst disorder usually means, how intermittent explosive disorder is recognized, what symptoms and warning signs look like, and which causes, risk factors, similar conditions, and complications may need professional evaluation.

Sudden, repeated anger outbursts can be frightening for the person experiencing them and for the people nearby. In everyday language, people may call this...

Othello Syndrome: Causes, Risk Factors, and Relationship Effects

Learn what Othello syndrome means, how delusional jealousy differs from ordinary jealousy, which symptoms and risk factors matter, and when urgent evaluation may be needed.

Othello syndrome is a form of delusional jealousy in which a person becomes convinced that a spouse or romantic partner is unfaithful, even when...

Orthorexia Nervosa and Disordered Eating: Overview and Complications

Learn what orthorexia nervosa means, how it differs from healthy eating, which signs may appear, what risk factors contribute, and when evaluation may be important.

Orthorexia nervosa describes a harmful fixation on eating in a way a person considers “healthy,” “clean,” “pure,” or correct. The concern is not simply...

Oppositional Defiant Disorder in Children: Symptoms, Evaluation, and Warning Signs

Learn what oppositional defiant disorder is, how ODD symptoms differ from typical defiance, what causes may contribute, and when professional evaluation matters.

Oppositional defiant disorder is more than occasional arguing, stubbornness, or limit-testing. It describes a persistent pattern of angry or irritable mood, argumentative or defiant...

Onychophagia in Adults and Children: Symptoms and Risks

Learn what onychophagia means, how chronic nail biting appears, what may contribute to it, what it can be confused with, and when symptoms or complications may need professional evaluation.

Onychophagia is the medical term for chronic nail biting. Many people bite their nails occasionally, especially during stress, boredom, or concentration. It becomes more...

Olfactory Reference Syndrome Signs, Risk Factors, and Effects

A clear guide to olfactory reference syndrome, including its main symptoms, signs, thought patterns, possible causes, risk factors, diagnostic context, and complications.

Olfactory reference syndrome is a mental health condition in which a person becomes persistently preoccupied with the belief that they are giving off an...

Olfactory Hallucinations and Phantosmia: Symptoms and Possible Causes

Understand olfactory hallucinations, including phantom smell symptoms, common causes, mental health and neurological context, risk factors, complications, and warning signs that may need professional evaluation.

A smell that no one else can detect can be unsettling, especially when it is strong, unpleasant, or keeps returning. Olfactory hallucinations are real...