Evidence-Based Supplement & Herb Guides

Juvenile bipolar disorder: Symptoms, Signs, Causes, and Complications

Juvenile bipolar disorder can involve manic, depressive, or mixed mood episodes in children and teens. Learn the key symptoms, common lookalikes, risk factors, diagnostic context, and complications that may require urgent evaluation.

Juvenile bipolar disorder refers to bipolar disorder when symptoms begin in childhood or adolescence. It involves episodes of unusually high, energized, irritable, or expansive...

Juvenile anxiety disorder overview: Types, symptoms, risks, and effects

Juvenile anxiety disorder can involve separation fears, social avoidance, chronic worry, panic-like symptoms, physical complaints, and school or family disruption. Learn the main signs, risk factors, common diagnostic confusions, and when professional evaluation may matter.

Anxiety can be a normal part of childhood, but it becomes clinically important when fear, worry, avoidance, or physical tension is persistent, hard to...

Jouissance Disorder Symptoms, Signs, Causes, and Diagnostic Context

A clear overview of the nonstandard term jouissance disorder, including possible symptoms, related diagnoses, causes, risk factors, complications, and when evaluation may be important.

“Jouissance disorder” is not a formal diagnosis in major clinical manuals such as DSM-5-TR or ICD-11. The word “jouissance” comes from French and is...

Jealousy Disorder: Symptoms, Signs, Causes, and Complications

Learn what jealousy disorder can mean, including delusional and obsessional jealousy, common symptoms, causes, risk factors, complications, and when evaluation may be important.

Jealousy can be a normal human emotion, especially when a valued relationship feels threatened. It becomes clinically concerning when suspicion becomes fixed, intrusive, disproportionate,...

Jactitation Disorder in Children and Adults: Signs and Risk Factors

Clear overview of jactitation disorder, including rhythmic sleep movements, common signs, causes, risk factors, complications, diagnostic context, and warning signs that may need professional evaluation.

Jactitation disorder is an older term for repetitive, rhythmic movements that happen around sleep, most often in infants and young children. The modern clinical...

Isolation-induced psychosis: Symptoms, Signs, Causes, and Risk Factors

Learn what isolation-induced psychosis means, how symptoms can appear, what may contribute to it, and when hallucinations, paranoia, or sudden confusion may need professional evaluation.

Isolation-induced psychosis is a descriptive term for psychotic symptoms that appear, worsen, or become easier to sustain during periods of marked social isolation. It...

Isolation Syndrome Symptoms, Signs, Causes, and Complications

Isolation syndrome is a persistent pattern of social withdrawal that can affect mood, functioning, safety, and relationships. Learn the key symptoms, causes, risk factors, complications, and signs that professional evaluation may be needed.

Isolation syndrome is a practical term for a pattern of persistent social withdrawal, reduced contact with others, and shrinking participation in normal life roles....

Irritability Disorder: Symptoms, Signs, Causes, and Diagnostic Context

Irritability disorder can describe severe, persistent, or impairing anger and frustration patterns. Learn how symptoms, causes, risk factors, diagnostic context, and warning signs are evaluated.

Irritability can be more than being annoyed, impatient, or “in a bad mood.” In mental health, clinically significant irritability means a person is unusually...

Involuntary emotional expression disorder in Neurological Conditions

Learn what involuntary emotional expression disorder is, how it differs from mood disorders, which neurological conditions can cause it, and when evaluation may matter.

Involuntary emotional expression disorder is a condition in which a person has sudden episodes of laughing, crying, or other emotional expression that feel difficult...

Intrusive thoughts disorder Explained: Symptoms, Risk Factors, and Complications

Clear, clinically grounded overview of intrusive thoughts, including symptoms, common themes, causes, risk factors, diagnostic distinctions, complications, and when urgent evaluation may be needed.

Intrusive thoughts can feel alarming because they often arrive suddenly, clash with a person’s values, and focus on topics the person would never choose...

Internalizing Disorder Signs, Related Conditions, and Complications

Learn what internalizing disorder means, how symptoms can appear in children, teens, and adults, what causes and risk factors may contribute, and when evaluation may be important.

Internalizing disorder is a broad mental health term for patterns of emotional distress that are mainly directed inward. Instead of showing up primarily as...

Intermittent Explosive Disorder Overview, Signs, Outbursts, and Related Conditions

Learn what intermittent explosive disorder is, how symptoms and outbursts can appear, what causes and risk factors may contribute, and when evaluation is important.

Intermittent explosive disorder is a mental health condition in which a person has repeated episodes of impulsive, aggressive anger that are much more intense...

Intellectual Disability (Intellectual Developmental Disorder): Symptoms, Signs, Causes, and Complications

Intellectual disability affects reasoning, learning, daily living skills, and adaptive functioning. Learn the signs, causes, risk factors, diagnostic context, overlapping conditions, and complications that may require professional evaluation.

Intellectual disability, also called intellectual developmental disorder in some diagnostic systems, is a neurodevelopmental condition that begins during the developmental period and affects both...

Insomnia Disorder Overview, Symptoms, Signs, Causes, Risk Factors, and Complications

A clear guide to insomnia disorder, including how it differs from ordinary poor sleep, the symptoms and signs to watch for, common causes, risk factors, related conditions, complications, and when professional evaluation may be important.

Insomnia disorder is more than an occasional bad night. It describes a persistent pattern of difficulty falling asleep, staying asleep, waking too early, or...

Insecure attachment disorder: Overview and Key Warning Signs

Learn what insecure attachment disorder means, how insecure attachment differs from formal attachment disorders, and what symptoms, causes, risks, and complications may require professional evaluation.

“Insecure attachment disorder” is a phrase many people use when attachment patterns feel painful, confusing, or disruptive. Clinically, however, it is important to separate...

Inhibited personality disorder Signs, Risk Factors, and Related Conditions

Understand inhibited personality disorder, its overlap with avoidant personality disorder, key symptoms, possible causes, diagnostic context, similar conditions, and complications that may require professional evaluation.

Inhibited personality disorder is not the most common current diagnostic name in modern clinical practice. When people use this phrase, they are usually referring...

Inflexible personality disorder: Overview, symptoms, signs, causes, and complications

Learn what inflexible personality disorder usually means, how it overlaps with obsessive-compulsive or anankastic personality patterns, what signs may appear in daily life, and when professional evaluation may be important.

“Inflexible personality disorder” is not usually used as a stand-alone formal diagnosis in current psychiatric classification systems. In everyday language, it often describes a...

Infantile autism Early Signs, Behavioral Symptoms, and Complications

Clear, condition-focused overview of infantile autism, including early signs, core symptoms, possible causes, risk factors, diagnostic context, similar conditions, and complications.

Infantile autism is an older clinical term for what is now usually described as autism spectrum disorder when the features are present from early...

Induced delusional disorder: Symptoms, Signs, and Relationship Patterns

Clear explanation of induced delusional disorder, including shared delusions, relationship signs, common symptoms, risk factors, diagnostic context, complications, and urgent warning signs.

Induced delusional disorder is a rare psychotic condition in which a delusional belief becomes shared between two or more closely connected people. It is...

Inadequacy Neurosis: Meaning, Symptoms, Causes, and Mental Health Context

Learn what inadequacy neurosis means today, how it relates to low self-worth and anxiety, and when persistent feelings of inferiority may need professional evaluation.

“Inadequacy neurosis” is an older mental health term that is not used as a formal diagnosis in modern DSM or ICD classification systems. Today,...