Overview
Body dysmorphic disorder (BDD) is a mental health condition in which a person becomes preoccupied with one or more perceived flaws in their appearance that others either cannot see or consider very minor. Common concerns include the skin, hair, nose, face, body size or shape.
People with BDD may spend hours each day checking mirrors, comparing themselves with others, grooming, seeking reassurance or trying to hide the perceived flaw. These thoughts and behaviours cause significant distress and can interfere with work, school, relationships and daily life. BDD often starts in adolescence and affects people of all genders. It is linked to depression, anxiety and a high risk of suicide. BDD is treatable with cognitive behavioural therapy and certain antidepressants.
BDD is not vanity or self-obsession. People with BDD usually feel deeply ashamed and often keep their worries secret for years, which can delay help. Family and friends may notice the time spent checking or the avoidance of social events before the person talks about it.
When to get urgent help
Seek urgent help for thoughts of suicide or self-harm, or plans to perform risky procedures on oneself.
Causes and risk factors
- Genetics: BDD and obsessive-compulsive disorder run in families
- Brain differences: in visual processing and emotional regulation
- Personality traits: perfectionism, anxiety, sensitivity to rejection
- Life experiences: bullying, teasing about appearance, abuse, neglect
- Cultural and social pressures around appearance
- Social media and image-focused environments
- Other mental health conditions: OCD, depression, social anxiety, eating disorders
How it develops (pathophysiology)
Normal perception of appearance
Most people notice small imperfections in their appearance but do not dwell on them. The brain processes faces and bodies as a whole (holistic processing), and emotional responses to appearance are moderated by the prefrontal cortex and other regulatory systems.
What goes wrong
BDD is closely related to obsessive-compulsive disorder (OCD) and involves:
- Altered visual processing: research suggests people with BDD process visual details differently, focusing on small features rather than the overall picture (detail-focused processing). This can make minor imperfections seem larger and more noticeable.
- Brain network differences: imaging studies show differences in brain areas involved in visual processing, attention and emotional regulation, and in circuits similar to those involved in OCD, linking the frontal cortex and the basal ganglia.
- Neurotransmitters: changes in serotonin signalling are implicated, which is why SSRIs often help.
- Cognitive patterns: people with BDD may hold strong beliefs that the flaw makes them ugly or unacceptable, and that others are noticing or judging them. Self-worth becomes tied to appearance.
- Compulsive behaviours: checking, grooming, reassurance-seeking and camouflaging reduce anxiety temporarily, but reinforce the preoccupation and prevent people from learning that the feared outcome does not happen (negative reinforcement).
- Avoidance: avoiding social situations or mirrors maintains fear and isolation.
Why the symptoms happen
- Intrusive thoughts about appearance reflect obsessive processes.
- Repetitive behaviours relieve distress temporarily.
- Distress and shame result from beliefs about the flaw and fear of judgement.
- Low mood and anxiety reflect the impact of the condition.
- Seeking cosmetic procedures is common but rarely relieves symptoms, as the underlying preoccupation remains.
How treatment acts on the mechanism
Cognitive behavioural therapy (CBT) with exposure and response prevention helps people face situations they avoid and resist compulsive behaviours, gradually reducing anxiety and changing beliefs about appearance. Perceptual retraining teaches holistic, non-judgemental ways of looking at oneself. SSRIs (such as fluoxetine or sertraline), often at higher doses than for depression, reduce obsessive thoughts and distress. Cosmetic surgery is generally not recommended, as it rarely helps and can worsen symptoms.
Types
- BDD with good or fair insight: recognises that beliefs may not be true
- BDD with poor insight
- BDD with absent insight or delusional beliefs
- Muscle dysmorphia: preoccupation with being too small or not muscular enough, more common in men
Signs and symptoms
- Spending a lot of time worrying about a perceived flaw in appearance
- Frequently checking mirrors, or avoiding them
- Comparing appearance with others
- Seeking reassurance about appearance
- Excessive grooming or picking at skin
- Hiding the perceived flaw with clothes, make-up or posture
- Avoiding social situations, work or school
- Seeking cosmetic procedures
- Feeling anxious, depressed or ashamed
- Thoughts of suicide
How it is diagnosed
- Assessment by a GP or mental health professional
- Questions about appearance concerns, behaviours and their impact
- Screening questionnaires
- Assessment for depression, anxiety, OCD, eating disorders and suicide risk
Possible complications
- Depression
- Anxiety and social isolation
- Self-harm and suicide
- Substance misuse
- Skin damage from picking
- Repeated cosmetic procedures without satisfaction
- Problems at work, school and in relationships
Goals of treatment
Treatment aims to reduce preoccupation and distress, decrease compulsive behaviours and avoidance, and improve quality of life and functioning.
Medicines
- SSRIs: fluoxetine, sertraline, escitalopram, often at higher doses
- Clomipramine as an alternative
- Augmentation with other medicines in some cases, under specialist care
Other treatments
- CBT with exposure and response prevention
- Perceptual retraining (mirror retraining)
- Family support
- Specialist services for severe BDD
Living with it and prevention
- Seek help early if appearance worries are affecting daily life
- Limit time spent on image-focused social media
- Focus on qualities other than appearance
- Avoid cosmetic procedures as a way of resolving BDD
Monitoring and follow-up
Treatment progress is reviewed regularly, including mood, behaviours and suicide risk. SSRIs are usually continued for at least a year after improvement.
Outlook
BDD is treatable, and many people improve significantly with CBT and medicine. Without treatment, it tends to be long-lasting.
Special considerations
- Teenagers: BDD often starts in adolescence; early help is important
- People seeking cosmetic procedures: screening for BDD is recommended
- Men: muscle dysmorphia may be overlooked
