Evidence-Based Supplement & Herb Guides

Auditory Hallucinations Symptoms, Causes, and Complications Explained

Understand auditory hallucinations, including common symptoms, possible causes, risk factors, effects, complications, and how clinicians evaluate voice-hearing in context.

Auditory hallucinations happen when a person hears sounds, voices, music, or other auditory experiences that are not coming from an external source. They can...

Atypical Depression Overview: What It Means and How It Presents

A clear guide to atypical depression, including mood reactivity, hypersomnia, increased appetite, heavy limbs, rejection sensitivity, causes, risk factors, complications, and diagnostic context.

Atypical depression is a pattern of depressive symptoms in which mood can temporarily improve when something positive happens, even though the underlying depression remains...

AttentionDeficitHyperactivity Disorder ADHD: Overview, Symptoms, Causes, and Complications

Learn what ADHD is, how symptoms appear in children, teens, and adults, what factors may contribute to risk, and when attention problems need professional evaluation.

Attention-deficit/hyperactivity disorder is a neurodevelopmental condition that affects attention, activity level, impulse control, organization, and self-regulation. It begins in childhood, but it may not...

Attention-Deficit Disorder Causes, Risk Factors, and Diagnostic Context

Clear, condition-focused overview of attention-deficit disorder, including how ADD relates to ADHD, common symptoms, causes, risk factors, effects, complications, and diagnostic context.

Attention-deficit disorder is a familiar term, but it is no longer the formal medical name used in most diagnostic systems. What many people still...

Attachment Disorder Overview: Types, Effects, and Complications

Clear overview of attachment disorder, including reactive attachment disorder, disinhibited social engagement disorder, key signs, causes, risk factors, developmental effects, complications, and diagnostic context.

Attachment disorders are serious early-childhood mental health conditions linked to severe problems in caregiving, neglect, deprivation, or repeated disruptions in the child’s ability to...

Asperger Syndrome Overview, Symptoms, Signs, and Causes

Clear, condition-focused overview of Asperger syndrome as it is understood today, including current autism terminology, core signs, causes, risk factors, daily effects, complications, and diagnostic context.

Asperger syndrome is an older diagnostic term for a pattern of autistic traits that usually involved social-communication differences, restricted interests, repetitive behaviors, and average...

Apotemnophilia Symptoms, Signs, Risk Factors, and Effects

Learn what apotemnophilia means today, including body integrity dysphoria symptoms, warning signs, possible causes, risk patterns, effects, complications, and diagnostic context.

Apotemnophilia is an older term for a rare and serious disturbance in body experience in which a person has a persistent desire or perceived...

Aphasia Symptoms, Types, Causes, Risk Factors, and Complications

A clear guide to aphasia symptoms, signs, causes, risk factors, complications, and diagnostic evaluation, with emphasis on sudden language changes and progressive patterns.

Aphasia is a language disorder caused by damage to parts of the brain involved in speaking, understanding, reading, or writing. It can appear suddenly...

Apathy Symptoms and Causes: When Low Motivation May Signal a Health Concern

Clear explanation of apathy, including common symptoms, signs, causes, risk factors, daily effects, complications, and how clinicians distinguish it from depression, fatigue, and cognitive decline.

Apathy is more than “not caring.” In clinical and mental health contexts, it usually means a noticeable reduction in motivation, initiative, emotional responsiveness, or...

Apathic-Akinetic Syndrome Signs, Risk Factors, and Diagnostic Context

Learn what apathic-akinetic syndrome means, how symptoms appear, what causes it, which risks matter, and how clinicians distinguish it from depression, delirium, catatonia, dementia, and other conditions.

Apathic-akinetic syndrome describes a marked loss of self-initiated activity, speech, emotional expression, and goal-directed behavior. A person may appear awake and physically capable of...

Anxious distress in depression: Symptoms, severity, and risks

Learn what anxious distress means, how it appears during mood episodes, which symptoms and signs matter most, and when safety or diagnostic concerns need prompt evaluation.

Anxious distress is a pattern of anxiety symptoms that can appear during a depressive or bipolar mood episode. It is not usually used as...

Anxiety neurosis Signs, Diagnosis, Risk Factors, and Similar Conditions

Anxiety neurosis is an older term for persistent anxiety symptoms. Learn what it means today, common signs, physical effects, causes, risk factors, diagnostic context, and possible complications.

Anxiety neurosis is an older term once used for patterns of persistent anxiety, excessive worry, nervous tension, panic-like episodes, and anxiety-related physical symptoms. It...

Anxiety Disorder Symptoms, Causes, Risk Factors, and Effects

Clear, condition-focused overview of anxiety disorder symptoms, signs, causes, risk factors, daily effects, complications, and diagnostic context.

Anxiety becomes a disorder when fear, worry, physical tension, or avoidance are persistent, excessive for the situation, and disruptive to daily life. Occasional anxiety...

Anxiety Disorder Not Otherwise Specified Overview, Symptoms, and Causes

Clear explanation of Anxiety Disorder NOS, including what the older label means, how symptoms appear, why diagnosis can be unclear, and what complications or warning signs may require urgent evaluation.

Anxiety can be a normal response to pressure, uncertainty, danger, or major change. It becomes clinically significant when fear, worry, physical tension, or avoidance...

Anxiety Attack Overview, Symptoms, Causes, and Warning Signs

Anxiety attacks can feel sudden and physical. Learn what the term means, how symptoms and panic signs appear, what can trigger episodes, and when urgent evaluation is needed.

An anxiety attack can feel sudden, intense, and physically alarming. People often use the phrase to describe a wave of fear, dread, or nervous-system...

Antisocial Personality Disorder Overview: Signs, Risks, and Complications

A clear guide to antisocial personality disorder, including symptoms, signs, developmental causes, risk factors, diagnostic context, real-world effects, and serious complications.

Antisocial personality disorder is a serious mental health condition involving a long-term pattern of violating other people’s rights, disregarding social rules, acting impulsively or...

Anosognosia Symptoms, Causes, Risk Factors, and Diagnostic Context

Learn what anosognosia means, how it appears in stroke, dementia, psychosis, and brain injury, and why impaired awareness can affect safety, diagnosis, and daily functioning.

Anosognosia is a lack of awareness of an illness, disability, or change in functioning that is clear to other people. It is most often...

Anorexia Nervosa Signs and Symptoms: What the Condition Can Look Like

A clear guide to anorexia nervosa symptoms, behavioral signs, causes, risk factors, diagnostic context, body effects, complications, and urgent warning signs.

Anorexia nervosa is a serious eating disorder in which food restriction, fear of weight gain, and disturbance in body image or self-evaluation can become...

Anorexia athletica Overview: Warning Signs, Risk Factors, and Effects

Clear guide to anorexia athletica, including how compulsive exercise, food restriction, body image pressure, and low energy availability can affect mental health, physical health, and athletic performance.

Anorexia athletica describes a harmful pattern in which exercise, training, weight control, and food restriction become rigid, compulsive, or medically unsafe. It is most...

Anhedonia Causes, Risk Factors, Diagnosis Context, and Complications

Anhedonia can involve loss of pleasure, reduced motivation, social withdrawal, emotional flatness, and diminished reward from daily life. Learn the signs, causes, risk factors, complications, and diagnostic context.

Anhedonia is a loss or marked reduction in the ability to feel interest, pleasure, enjoyment, or satisfaction from experiences that would usually feel rewarding....