Definition and Diagnosis
Specific phobia is characterized by marked, disproportionate fear or anxiety about a particular object or situation (such as heights, animals, injections, or flying), which is actively avoided or endured with intense distress, and is out of proportion to the actual danger posed.
Epidemiology
Specific phobia is one of the most common anxiety disorders, with lifetime prevalence estimates around 7-12%. Onset is often in childhood, and animal, natural environment, and situational subtypes are among the most frequently reported.
Risk Factors
Risk factors include a direct traumatic experience with the feared object or situation, observational learning from others' fear responses, informational transmission (such as frightening information from others), and a temperamentally anxious or behaviorally inhibited disposition.
Symptoms and Subtypes
Exposure to the feared stimulus provokes an immediate anxiety response, which may take the form of a panic attack in adults. The fear leads to avoidance or endurance with marked distress, and symptoms typically persist for six months or more.
Diagnosis
DSM-5-TR criteria require marked fear or anxiety about a specific object or situation, immediate anxiety response on exposure, active avoidance or endurance with distress, disproportion to actual danger, persistence of six months or more, and significant impairment or distress.
Treatment
Exposure-based cognitive behavioral therapy is highly effective and considered first-line treatment, gradually and systematically exposing the individual to the feared stimulus. Medication is not typically first-line but may be used adjunctively for severe cases or situational anxiety (e.g., before flying).
Prognosis
With exposure-based treatment, prognosis is generally very good, with many individuals achieving substantial or complete symptom resolution after a relatively brief course of therapy.
Reference
New Oxford Textbook of Psychiatry (2nd ed.).