Understanding OCD
Obsessive-Compulsive Disorder involves two core features: obsessions — intrusive, unwanted thoughts, images, or urges that cause significant distress — and compulsions — repetitive behaviors or mental acts performed to reduce the distress caused by obsessions. OCD affects approximately 2-3% of the population and, without effective treatment, significantly impairs daily functioning.
The defining feature of OCD is not the content of the thoughts but their intrusive, ego-dystonic quality — they feel foreign, unwanted, and inconsistent with the person's values. Paradoxically, efforts to suppress or neutralize obsessions typically strengthen them over time.
Common OCD themes
OCD organizes around themes rather than specific content. Common themes include: contamination and disease, harm (fear of accidentally hurting others), scrupulosity (religious or moral obsessions), symmetry and order, sexual or violent intrusive thoughts, and relationship OCD. Many people are ashamed of their OCD themes, particularly harm and sexual obsessions — it's important to know that having these thoughts is not the same as wanting or being likely to act on them.
ERP: the evidence-based treatment
Exposure and Response Prevention (ERP) is the gold-standard treatment for OCD with overwhelming research support. It involves gradually and systematically confronting feared situations, thoughts, or objects (exposures) while refraining from performing compulsions (response prevention). The refusal to compulse allows anxiety to peak naturally and then diminish, demonstrating that the feared outcome does not occur and that distress is tolerable.
ERP works through two mechanisms: habituation (the anxiety decreases with repeated exposure) and inhibitory learning (you learn that the feared catastrophe doesn't occur). Adequate ERP requires doing exposures that cause meaningful anxiety — not just easy situations. A skilled OCD therapist will design a hierarchy from less to more challenging exposures.
General anxiety therapists frequently give inadequate treatment to OCD by using relaxation techniques and cognitive restructuring without ERP. OCD requires ERP — seeking out a therapist who specifically specializes in OCD and ERP is strongly recommended. The IOCDF maintains a therapist directory of OCD specialists.
OCD spectrum conditions
Several conditions share features with OCD and respond to similar treatments: Body Dysmorphic Disorder (BDD) — preoccupation with perceived flaws in appearance; Hoarding Disorder — difficulty discarding possessions; Hair Pulling Disorder (Trichotillomania) and Skin Picking Disorder (Excoriation) — body-focused repetitive behaviors; and Health Anxiety with compulsive checking features. All respond to exposure-based treatments.
Medication for OCD
SSRIs are effective for OCD but typically require higher doses and longer trials than for depression. Fluvoxamine, fluoxetine, sertraline, and paroxetine have FDA approval for OCD. Response rates are 40-60% with medication alone, improving to 60-80% with the combination of ERP and medication. Clomipramine (a tricyclic) has the strongest evidence but more side effects.