Diagnostic Criteria for Obsessive‑Compulsive Disorder (OCD)

Core Symptom Requirements

Obsessions are recurrent, persistent thoughts, urges, or impulses that are experienced as intrusive and unwanted, producing marked anxiety or distress. 1
Compulsions are repetitive behaviors (e.g., washing, checking, ordering) or mental acts (e.g., counting, silent prayer) performed in response to an obsession or according to rigid rules. 1
The purpose of compulsions is to prevent or reduce anxiety, but the actions are not realistically connected to the feared outcome or are clearly excessive. 1

The obsessions or compulsions must be time‑consuming (≥ 1 hour per day) or cause clinically significant distress or impairment in social, occupational, or other important areas of functioning. This “or” rule means that either condition alone satisfies the criterion. 1
In children, rituals that exceed 1 hour per day are taken as an indicator of functional impairment. 2

DSM‑5 does not prescribe a minimum duration for OCD symptoms; diagnosis depends on the presence of qualifying obsessions/compulsions that meet the time‑consumption or impairment threshold, regardless of how long they have been present. 1

Dimension	Typical Content	Representative Compulsions
Contamination	Fear of dirt, germs, or illness	Excessive washing/cleaning
Harm‑related	Fear of causing harm to self or others	Repeated checking
Forbidden thoughts	Intrusive aggressive, sexual, or religious obsessions	Mental rituals, silent prayer
Symmetry	Need for order, exactness, or balance	Ordering, straightening, counting
Hoarding	Persistent difficulty discarding items (note: hoarding disorder is now a separate diagnosis)	Accumulation and related rituals

These five dimensions are consistently identified across factor‑analytic studies. 3

Symptoms must not be attributable to the physiological effects of a substance (e.g., drugs of abuse, medication) or another medical condition. 1
Symptoms must not be better explained by another mental disorder such as generalized anxiety disorder, body‑dysmorphic disorder, hoarding disorder, trichotillomania, eating disorders, substance‑related disorders, illness‑anxiety disorder, paraphilic disorders, or impulse‑control disorders. 1

Approximately 25 % of males with OCD experience symptom onset before age 10, and up to 80 % of cases begin before age 18. 2

Individuals (including children) recognize that their behaviors are excessive and express a desire for greater control, indicating distress and resistance. 2
Compulsions follow strict, inflexible rules rather than flexible personal preferences. 2
The primary function of compulsions is anxiety reduction (preventing feared outcomes), not gratification. 2
Unlike impulsive behaviors, which are ego‑syntonic (aligned with personal desires), OCD compulsions are ego‑dystonic (experienced as unwanted and distressing). [2][4]

The repetitive arranging of furniture is classified as a symmetry‑related compulsion, driven by the need for perfect alignment and a “just‑right” feeling. 5, 6

Compulsions are repetitive behaviors or mental acts performed in response to an obsession or according to rigid rules to achieve a sense of completeness. 6
In this case the compulsion manifests as a physical act (arranging furniture) carried out according to strict rules to attain perfect symmetry. 7

Obsessions are intrusive, unwanted thoughts, images, impulses, or urges that are persistent and recurrent. 7, 6
The phenomenon described is a behavioral act, not an intrusive thought, indicating it is a compulsion rather than an obsession. 5

Individuals typically retain insight that the behavior is excessive, distinguishing it from delusional thinking. 8

Symmetry concerns involve obsessions about order and exactness, paired with ordering, straightening, and repeating compulsions. 5
These compulsions are frequently performed to achieve a “just‑right” feeling. 5

A duration of at least six months satisfies the chronicity requirement for an obsessive‑compulsive disorder diagnosis. 7

Clinicians should avoid conflating the compulsion (the arranging behavior) with any underlying obsession; the behavioral act itself constitutes the compulsion. 5, 6