Evidence-Based Supplement & Herb Guides

Voyeuristic Disorder: Key Signs, Diagnostic Criteria, and Complications

A clear, clinically grounded guide to voyeuristic disorder, including symptoms, diagnostic features, possible causes, risk factors, privacy harms, complications, and signs that urgent evaluation may be needed.

Voyeuristic disorder is a mental health condition in which a person has recurrent, intense sexual arousal from observing an unsuspecting person who is naked,...

Violent behavior disorder Signs, Complications, and Urgent Warning Symptoms

Learn what violent behavior disorder may mean, including symptoms, warning signs, causes, risk factors, complications, diagnostic context, and when urgent evaluation may be needed.

Violent behavior disorder is not always a single, standalone diagnosis. In clinical practice, violent behavior is usually understood as a serious pattern of aggression...

Vascular Neurocognitive Disorder Symptoms and Functional Effects

Vascular neurocognitive disorder can cause slowed thinking, planning problems, memory changes, mood shifts, and functional decline. Learn how symptoms, causes, risk factors, complications, and diagnostic context fit together.

Vascular neurocognitive disorder is a decline in thinking, attention, planning, memory, or daily functioning caused by problems with blood flow in the brain. It...

Truman Show delusion Meaning, Core Beliefs, Risk Factors, and Effects

Learn what Truman Show delusion means, how it can appear in psychosis, which signs and risk factors matter, and when urgent evaluation may be needed.

Truman Show delusion is an informal name for a delusional belief that a person’s life is being secretly filmed, staged, scripted, or broadcast for...

Tropical psychosis: Symptoms, Medical Triggers, and Warning Signs

Tropical psychosis is an older descriptive term for psychotic symptoms occurring in tropical, travel-related, infectious, or culturally complex contexts. Learn how symptoms, signs, causes, risk factors, diagnostic considerations, and complications are understood today.

Tropical psychosis is best understood as a descriptive term, not as one single modern psychiatric diagnosis. It has been used to describe psychotic symptoms...

Trichophagia in Children, Teens, and Adults: Signs and Complications

Learn what trichophagia means, how it differs from trichotillomania and pica, what signs to watch for, and why swallowed hair can cause serious complications.

Trichophagia means eating hair. It is most often discussed in connection with trichotillomania, or hair-pulling disorder, because some people who pull out their hair...

Treachery delusion Symptoms, Signs, Causes, and Diagnostic Context

Treachery delusion involves a fixed belief that others are betraying, deceiving, or plotting harm. Learn how it may appear, what can contribute to it, and when evaluation is urgent.

A treachery delusion is not usually a formal diagnosis by itself. It is best understood as a descriptive term for a delusional belief centered...

Traumatic grief overview: How traumatic loss affects grief and mental health

Traumatic grief can combine bereavement pain with trauma symptoms. Learn the key signs, causes, risk factors, diagnostic context, and complications that may require urgent evaluation.

Traumatic grief is an intense grief response that occurs after a death experienced as sudden, violent, frightening, preventable, or deeply destabilizing. It can include...

Traumatic Brain Injury (TBI): Signs, Causes, Complications, and Diagnostic Context

Understand traumatic brain injury symptoms, signs, causes, risk factors, complications, and diagnostic context, including when head injury warning signs need urgent evaluation.

Traumatic brain injury, often shortened to TBI, is an injury that disrupts normal brain function after a bump, blow, jolt, penetrating injury, or other...

Transvestic Disorder Overview: Meaning, Symptoms, Risk Factors, and Complications

Learn what transvestic disorder means, how symptoms and signs are recognized, how it differs from cross-dressing or gender identity, and what complications may require urgent evaluation.

Transvestic disorder is a psychiatric diagnosis used when a person has recurrent, intense sexual arousal from cross-dressing and that pattern causes significant distress, relationship...

Transient psychotic disorder: Signs, triggers, and possible complications

Learn what transient psychotic disorder means, how brief psychosis can appear, what symptoms and risk factors matter, and when sudden psychotic symptoms need urgent evaluation.

Transient psychotic disorder is a short-lived episode of psychosis in which a person temporarily loses some contact with reality. It can involve hallucinations, delusions,...

Toxic psychosis: Hallucinations, delusions, triggers, and complications

Clear, condition-focused guide to toxic psychosis, including what it means, how symptoms appear, common substance and toxin causes, risk factors, diagnostic context, look-alike conditions, and possible complications.

Toxic psychosis is a state of psychosis caused by the direct effects of a substance, medication, poison, or other toxic exposure. During an episode,...

Tourette syndrome in Children and Adults: Symptoms, Causes, and Diagnostic Context

Tourette syndrome is a childhood-onset tic disorder involving repeated motor and vocal tics. Learn how symptoms appear, what causes and risk factors are known, how diagnosis works, and which complications or warning signs deserve prompt evaluation.

Tourette syndrome is a neurodevelopmental tic disorder that begins in childhood and causes repeated, involuntary movements and sounds called tics. These tics can be...

Thought Disorder: Symptoms, Signs, Causes, and Clinical Meaning

Learn what thought disorder means, how disorganized thinking may appear in speech and behavior, what conditions can cause it, and when urgent evaluation may be needed.

Thought disorder is a disturbance in the way thoughts are organized, connected, and expressed. In everyday life, it may show up as speech that...

Terror disorder in Adults and Children: Symptoms, Sleep Terrors, Panic, and PTSD Clues

Terror disorder is not a formal diagnosis, but repeated episodes of intense fear may reflect panic disorder, sleep terrors, PTSD, phobias, medical causes, or substance-related symptoms. Learn the key symptoms, signs, causes, risks, and urgent warning signs.

“Terror disorder” is not a standard clinical diagnosis in major psychiatric manuals, but the phrase is sometimes used by people trying to describe repeated...

Teenage depression: Overview, Symptoms, Signs, Causes, Risk Factors, and Complications

A clear guide to teenage depression, including symptoms, warning signs, causes, risk factors, effects on daily life, diagnostic context, complications, and when urgent evaluation may be needed.

Teenage depression is more than sadness, moodiness, or a difficult phase. It is a mental health condition that can change how a young person...

Tardive psychosis: Symptoms, Medication-Related Patterns, and Diagnostic Context

Tardive psychosis is a proposed antipsychotic-related psychosis pattern linked to dopamine supersensitivity. Learn how symptoms, signs, risks, complications, and diagnostic context are understood.

Tardive psychosis is a proposed and controversial term used to describe a pattern of psychotic symptoms that may emerge or worsen after long-term exposure...

Tardive Dystonia Causes, Risk Factors, and Warning Signs

Learn what tardive dystonia is, how it differs from related movement disorders, which symptoms and risk factors matter, and when urgent evaluation may be needed.

Tardive dystonia is a medication-associated movement disorder that causes involuntary muscle contractions, twisting movements, and abnormal postures. It belongs to the broader group of...

Tardive Dyskinesia Explained: Signs, Causes, and Medication-Related Risks

Clear overview of tardive dyskinesia, including what it is, how symptoms appear, medication-related causes, risk factors, diagnostic context, possible complications, and when symptoms may need urgent evaluation.

Tardive dyskinesia is a medication-associated movement disorder that causes involuntary, repetitive movements a person cannot fully control. It most often appears after exposure to...

Tardive Akathisia Symptoms, Signs, Causes, and Complications

Learn what tardive akathisia is, how delayed restlessness and movement symptoms appear, what causes it, who is at higher risk, and when symptoms need urgent evaluation.

Tardive akathisia is a delayed-onset movement and restlessness syndrome most often linked to long-term exposure to dopamine receptor-blocking medicines, especially antipsychotic medications. The word...