The Link Between OCD and Eating Disorders

OCD: Core Characteristics

Obsessive-compulsive disorder is classified in the line of anxiety disorders, characterised by the presence of disabling obsessions and/or compulsions that interfere with normal functioning and cause anxiety and distress. In practice, this may mean that symptoms are present on most days over a period (for example, at least two successive weeks) or are so time-consuming or impairing that they significantly interfere with daily life (work, social life, family life). There is a presence of behavioural patterns involving obsessions (uncontrollable thoughts and fears) and compulsions (subsequent repetitive behaviours). Trying to ignore obsessive thoughts is often ineffective and only increases anxiety and distress in people with OCD. Therefore, OCD is a serious, often chronic, mental health condition.

OCD obsessions are intrusive, unwanted, persistent thoughts, urges, or mental images that repeatedly invade the mind. The most common symptoms in OCD include two core components, obsessions and compulsions.

Common themes of obsessions include:

• Excessive fear of contamination (e.g., germs, dirt, disease)
• Fear of harm – either harming oneself or others, or accidentally causing harm (e.g. leaving the cooker on, setting fire, causing an accident).
• Disturbing or taboo thoughts/images – e.g., violent, sexual, blasphemous, or other unwanted intrusive mental content.
• Thoughts of self-harm or inflicting physical harm on others
• Need for symmetry, order or exactness. A compulsion to have things “just right,” or arranged in a certain order.

Common themes of compulsions include:

• Cleaning or washing – e.g., excessive hand‑washing, showering.
• Checking on things repeatedly (for example, checking that doors are locked, the cooker/gas is off, and windows are closed).
• Counting, ordering, arranging, making sure objects are in a particular order, rearranging until “just right,” and counting rituals.
• Mental rituals – repeating words silently, praying, mentally “neutralising” thoughts, repeating mental checks.
• Avoidance or reassurance-seeking — avoiding triggers (places, people), or repeatedly seeking reassurance (e.g., asking family/friends whether things are okay).

Eating Disorders: Core Characteristics

Eating disorders are a group of mental health conditions where a person’s relationship with food, eating, weight and body shape becomes disturbed. For people with eating disorder symptoms, it’s never just about ”eating too much” or ”eating too little every now and then”. They often use control over food or eating as a way to cope with emotions or stressful situations.

People with eating disorders usually struggle with low self-esteem and co-occurring mental health challenges, such as depression and anxiety. Young individuals in their teenage years are the most vulnerable to eating disorders, often requiring an eating disorder examination, but these disorders can impact anyone at any age and of any gender.

The common types and core characteristics of each include:

• Anorexia nervosa – Restricting or severely limiting food intake, excessive control over diet/weight (e.g., starvation, dieting, over‑exercising, purging), an intense fear of gaining weight, distorted body image (seeing oneself as overweight even if underweight)
• Bulimia nervosa – Recurrent episodes of uncontrollable overeating or “binge‑eating,” followed by compensatory or “purging” behaviours (self‑induced vomiting; laxative/diuretic use; over‑exercise; fasting) to prevent weight gain or “undo” bingeing. Often intense preoccupation with body shape, weight, and food.
• Binge Eating Disorder (BED) – Repeated episodes of binge eating (large amounts of food in a short time), with a feeling of loss of control over the eating, often done in secret, without regular compensatory behaviours. After bingeing, feelings of guilt/shame, and distress frequently lead to weight gain or health issues.
• Other Specified Feeding or Eating Disorder (OSFED) – This applies when a person shows significant disordered eating behaviours and distress but does not precisely meet the criteria for Anorexia, Bulimia, or BED. Examples: “atypical anorexia” (all anorexia behaviours but “normal” weight), low-frequency bulimia/binge episodes, purging without bingeing, night‑eating syndrome, etc. OSFED is common and can be just as serious.

Overlapping Symptoms

Although these conditions are regarded as separate, eating disorders co-occur with obsessive-compulsive disorder in many cases. OCD and eating disorders have more overlapping characteristics than people are usually aware of. Obsessive thoughts resulting in harmful behaviour patterns are the main characteristic of both eating disorders and OCD. OCD’s cyclical concept of obsessions (repetitive, intrusive thoughts and impulses) and compulsion (ritualistic activities performed as a response to them) can be applied to most eating disorders.

The disruptive thoughts in people with eating disorders are primarily related to their body image and food intake. For example, the individual becomes preoccupied with the possibility of gaining weight and indulges in harmful compulsive behaviours as a response to repetitive thoughts. All in all, obsessive-compulsive behaviours can act as the enforcer of unhealthy eating habits. Below are listed the similarities between symptoms of OCD and the most common eating disorders:

• OCD and anorexia share perfectionism as their vital component. Perfectionism tendencies lead individuals to aim for unrealistically high goals, making their sense of self-worth reliant on achieving them.
• OCD and bulimia both revolve around ritualistic behaviours. The OCD-related tendency towards ritualistic actions gives way to the repetitive eating behaviours linked to bulimia. This is the basis of the binging and purging cycles of individuals with bulimia.
• OCD and binge-eating disorder share the concept of compulsion. In their bingeing episodes, people with BED may feel like they lose control over the amount of food they consume. Compulsive behaviour also serves as a coping mechanism for emotional distress in people with OCD.

Overlapping Behaviours

Although these conditions are regarded as separate, both disorders, eating disorders and obsessive-compulsive disorder, co-occur in many cases. OCD and eating disorders have more overlapping characteristics than people are usually aware of. Both OCD and EDs involve compulsive behaviours and obsessive thinking. In both conditions, behaviours are driven by anxiety or intrusive thoughts rather than by rational choice. People may engage in rituals or rigid rules to reduce anxiety, either related to contamination/fear in OCD or food/weight/body shape in EDs.

Besides the ones we mentioned above, other core ED and OCD symptoms include:

• Perfectionism/Control
• Anxiety/Stress Management
• Avoidance Behaviours
• Cognitive Rigidity/Black-and-White Thinking
• Impact on Functioning

Also, there are shared traits between the following conditions:

• OCD and binge-eating disorder share the concept of compulsion. In their bingeing episodes, people with BED may feel like they lose control over the amount of food they consume. Compulsive behaviour also serves as a coping mechanism for emotional distress in people with OCD.
• OCD and anorexia share perfectionism as their common component. Perfectionism tendencies lead people to aim for unrealistically high goals, making their sense of self-worth reliant on achieving them.
• OCD and bulimia both revolve around ritualistic behaviours. The OCD-related tendency towards ritualistic actions gives way to the repetitive eating behaviours linked to bulimia. This is the basis of the binging and purging cycles of individuals with bulimia.

Obsessions Related to Food, Body, and Weight

Obsessing over food, body and weight can be as distressing and consuming as any shared OCD obsession (e.g. contamination, checking), but their content is different. These obsessions involvepersistent, intrusive thoughts, images, or worries about food, eating, body shape, weight, or body appearance. They are not transient or occasional, and can dominate a person’s mental space, often acting as a trigger or a maintaining factor for disordered eating behaviours or full-blown eating disorders. Detecting them early, even before behaviours become extreme, is important. Because of the overlap between eating disorder obsessions and OCD-type intrusive thoughts, diagnosis and treatment may be complicated.

Such obsessions often carry substantial emotional weight: fear (of weight gain, fatness, body change), shame, guilt, disgust, or intense dissatisfaction with the body. They may also include rigid beliefs or rules about what, when, how much, or even how food should be eaten; what one’s body “should” look like; or how to maintain a certain weight or shape.

Compulsions and Rituals in Eating Disorders

Compulsions and rituals are repetitive, rule-bound behaviours that people with eating disorders feel driven to perform. These behaviours often serve to reduce anxiety, neutralise distressing thoughts, or maintain a sense of control around food, eating, body shape, or weight.

In eating disorders, compulsions are not simply “bad habits.”
They are psychologically driven behaviours that temporarily relieve emotional distress but ultimately reinforce the disorder. And this is why rituals around food and body are often compared to OCD-type compulsive behaviors patterns. Across conditions like Anorexia Nervosa, Bulimia Nervosa, Binge Eating Disorder, ARFID, and OSFED, compulsions develop because:

• They reduce anxiety or guilt in the short term (e.g., “If I cut the food into tiny pieces, it feels safer.”)
• They create a sense of order, predictability, or control, especially when emotions or bodily experiences feel overwhelming.
• They maintain obsessive thoughts related to weight, shape, food, or health and operate within the obsessive–compulsive cycle.
• They are reinforced through physiological mechanisms such as hunger, dopamine reward (e.g., bingeing), or endorphin release during excessive exercise.

Psychosocial Factors Contributing to the Co-occurrence of OCD and Eating Disorders

Factors leading to unhealthy eating patterns can stem from internal or interpersonal issues. Psychological triggers for anorexia, bulimia, BED, and other mental health challenges related to eating habits include low self-esteem, social isolation, feelings of incompetence, and anxiety. Interpersonal triggers involve complex relationships with family members, bullying, and a history of physical or sexual abuse. In the case of eating disorders, people experience food-related obsessive-compulsive cycles of behaviour as an attempt to cope with certain overwhelming emotions, including weight concerns. Actions like bingeing, purging, and excessive exercising can serve as a way to compensate for mental distress and seemingly establish control of one’s life. Eating disorders and OCD are closely linked and are both complex mental health challenges. OCD symptoms, such as compulsive behaviours, are similar to symptoms of an eating disorder.

Social and cultural influences shape a person’s perception of their own body shape and weight. For example, Western cultures promote narrow definitions of beauty and glorify thinness. Teenagers are at the highest risk of internalising this message and developing a distorted body image.

Treatment Approaches and Strategies for OCD

Treatment for OCD is based on evidence-based psychological therapies, primarily Cognitive Behavioural Therapy with Exposure and Response Prevention (CBT-ERP), supported where appropriate by SSRIs prescribed by psychiatrists or GPs, following completed self-report measures to assess the severity. CBT-ERP involves gradually facing feared situations while resisting compulsions, helping to retrain the brain’s threat system and reduce anxiety over time. Where OCD is severe or complex, multidisciplinary clinical teams may offer intensive therapy, medication reviews, dietetic input for food-related obsessions, and structured wellbeing strategies, ensuring the person receives holistic and personalised care.

While support workers do not deliver therapy, they do provide essential support services that play a huge role in daily regulation and successful treatment.

Support workers can:

• Reinforce strategies from therapy (e.g., encouraging ERP plans made by the clinician).
• Avoid reinforcing compulsions (no repeated reassurance, no enabling rituals).
• Create predictable, sensory-safe environments that reduce anxiety.
• Use graded exposure plans created by clinicians.
• Support with:
  • Daily routines
  • Structured activities
  • Community inclusion
  • Meal planning (if OCD overlaps with food rituals)
• Help the person notice patterns, triggers, or progress.
• Model calm, patient, non-judgmental behaviour.
• Encourage the person’s strengths and autonomy.

In many cases, there is an essential need for multidisciplinary support, including occupational therapists, clinical psychologists, psychiatrists, PBS practicioners, speech therapists or dietitians.

If you need specialist support, make a referral to our multidisciplinary team.

Find Support and Humanised Care with Unique Community Services

At Unique Community Services, we aim to reshape the approach to supporting people with eating disorders and OCD. Our care teams deliver humanised support to avoid the stressful instances of hospitalisation and help people stay in their familiar surroundings, close to their family members.

Our impact-driven team works closely with family members and care professionals to meet the person’s needs and preferences. We create person-centred care plans focused on preventing health risks while respecting the person’s privacy, dignity, and personal boundaries.

If you need tailored support, Unique Community Services is the right choice. We provide CQC-regulated support across the UK, with offices in Manchester and Leeds.

Contact us now, and we will outline a personalised care plan catering to your specific needs.