Eating Disorder: Bulimia Nervosa

Clinical Scenario

Sarah Mitchell, 34, a marketing manager, calls requesting a counselling referral. She is hesitant and almost cancelled the appointment several times. When explored sensitively, she discloses she has been living with bulimia nervosa for approximately 15 years since university. She binges and self-induces vomiting, the pattern varying from weeks without episodes to several times weekly during stress. She has never told anyone — not her boyfriend, family, or friends. Her dentist has noticed enamel erosion. She read a personal memoir about eating disorders that prompted her to seek help.

What This Case Tests

Creating a safe environment for a sensitive first-time disclosure; assessing the physical and psychological impact of long-standing bulimia; screening for medical complications of chronic purging; understanding eating disorder referral pathways; addressing shame and secrecy without judgement; risk assessment including self-harm and suicidal ideation

Common Mistakes Trainees Make

The three most common mistakes are: rushing past the emotional significance of the disclosure to focus on clinical assessment — this patient has kept a secret for 15 years and the act of telling someone is monumental, so you must honour that before switching to medical mode; failing to screen for physical complications of chronic purging including electrolyte imbalances, cardiac arrhythmia, oesophageal damage, dental erosion, and renal function, which can be life-threatening; and making the patient feel pathologised by reacting with shock or excessive clinical concern, when she needs normalisation and reassurance that eating disorders are treatable medical conditions.

The Consultation Challenge

Sarah has spent weeks building up the courage to make this call. The most important thing you do in the first two minutes will determine the entire consultation — she needs to feel safe, believed, and not judged.

When she hesitantly begins to disclose, slow down. Do not interrupt. Do not ask clarifying questions too quickly. Let her tell her story at her own pace. When she reveals the bulimia, respond with warmth: 'Thank you for telling me this, Sarah. I can only imagine how difficult this call has been. What you are describing is a recognised medical condition, and it takes real courage to seek help after carrying this alone for so long.'

Validate the secrecy: 'A lot of people with eating disorders keep it hidden for years. You have not done anything wrong, and there is no judgement here.' This is essential — shame is the primary barrier to treatment in bulimia.

Then move to a gentle but thorough assessment. Understand the current pattern: frequency of bingeing and purging, triggers, use of other compensatory behaviours such as laxatives, excessive exercise, or food restriction. Screen for physical complications: ask about dental health (she will mention the enamel erosion), cardiac symptoms including palpitations, chest pain, and dizziness, and general wellbeing. You will need bloods — U&Es with potassium being the critical one, FBC, and ECG if palpitations are present.

Assess her mental health: mood, anxiety, self-harm, and suicidal ideation. These are important comorbidity screens that should not be skipped.

For treatment, explain the pathway: specialist eating disorder services offer the best outcomes for bulimia, with guided self-help or CBT-ED as first-line per NICE. Offer interim support through practice counselling and signpost to Beat, the eating disorders charity. Be honest about NHS waiting times while emphasising that starting the process now is the important thing.

Address her concern about confidentiality and telling her boyfriend — respect her autonomy on timing.

Time check: Minutes 1-4 on creating safety and allowing the disclosure. Minutes 4-7 on gentle assessment of pattern and physical health. Minutes 7-10 on mental health screen and treatment pathway. Final 2 minutes on practical next steps, blood test arrangement, and follow-up.

How Examiners Mark This Case

Data Gathering and Diagnosis: Examiners assess whether you explore the eating disorder pattern comprehensively — bingeing, purging, other compensatory behaviours, frequency, and triggers — and screen for physical complications including electrolytes, cardiac risk, dental health, and BMI. A mental health comorbidity screen covering mood, self-harm, and suicidality demonstrates thoroughness.

Clinical Management and Medical Complexity: Examiners evaluate whether you arrange appropriate blood tests (U&Es for potassium, FBC), know the treatment pathway (specialist eating disorder services, CBT-ED as first-line for bulimia per NICE), and provide interim support. Signposting to Beat and offering practice counselling while awaiting specialist input shows a layered management approach.

Relating to Others: This is the most heavily weighted domain. Examiners look for genuine warmth during the disclosure, validation of the patient's courage, and normalisation of the condition without minimising it. Allowing space for emotion, not rushing to clinical assessment, and respecting her autonomy about when to tell her boyfriend all demonstrate person-centred care. The patient should leave feeling heard, not pathologised.

Example Opening

Strong opening: "Hello Sarah, thanks for calling. I can hear this might be a difficult conversation, and I want you to know there is no rush — just tell me as much or as little as you feel comfortable with."

After disclosure: "Sarah, thank you for trusting me with this. I know that must have taken enormous courage, especially after keeping it private for so long. What you are describing — bulimia — is a medical condition, not a weakness. And the fact that you have made this call tells me you are ready for things to change."

Avoid: "Fifteen years? Have you tried to stop before?" This sounds interrogative and implies she should have sought help sooner, reinforcing the shame that kept her silent.

How This Appears in the SCA

This case tests your ability to handle a sensitive first-time disclosure of a condition the patient has hidden for years. Examiners value candidates who create a genuinely safe environment, conduct a proportionate medical assessment, and demonstrate knowledge of the eating disorder treatment pathway.

Key Statistic

Bulimia nervosa affects approximately 1-2% of women, but the average time from onset to seeking treatment is 6-10 years due to shame and secrecy.

Relevant Guidelines

• NICE NG69: Eating disorders — recognition and treatment
• NICE QS175: Eating disorders
• MARSIPAN guidelines for medical risk in eating disorders.

Frequently Asked Questions

What blood tests should I arrange for a patient with chronic bulimia?

The essential tests are: U&Es with potassium being critical — hypokalaemia from purging can cause cardiac arrhythmia and is the most dangerous physical complication. Also FBC, renal function, magnesium and phosphate, and glucose. An ECG should be arranged if there are palpitations or electrolyte abnormalities. Thyroid function can be checked if there are concerns about metabolic changes. The MARSIPAN guidelines provide risk thresholds for medical monitoring in eating disorders.

What is the NICE-recommended first-line treatment for bulimia?

NICE NG69 recommends bulimia-focused guided self-help as first-line for adults with bulimia nervosa. If this is ineffective or declined, individual CBT specifically adapted for eating disorders (CBT-ED) should be offered. Unlike anorexia, antidepressants — specifically fluoxetine at higher doses of 60mg — can be considered as an adjunct or alternative. Specialist eating disorder services deliver the best outcomes; generic counselling or CBT without eating disorder expertise is less effective.

How do I handle the patient's request not to tell anyone?

Respect her autonomy. She has the right to control who knows about her condition. Assure her of confidentiality: 'Everything we discuss is confidential. I will not share this with anyone without your permission.' If she asks about telling her boyfriend, offer support: 'There is no pressure to tell anyone until you are ready. When you do decide, I can help you think about how to have that conversation, or offer couples counselling.' The only exception would be if you had serious concerns about her immediate safety.

How do I assess medical risk in chronic bulimia?

Key risk indicators include: frequency of purging (daily or multiple daily episodes are higher risk), method of purging (self-induced vomiting, laxative abuse, diuretics), duration of illness, current electrolyte results especially potassium, heart rate and blood pressure, BMI if significantly low, and any fainting, chest pain, or palpitations. The MARSIPAN guidelines provide specific thresholds. If potassium is below 3.0 mmol/L, this requires urgent medical attention and may need inpatient monitoring.

Should I explore what triggered her to seek help now after 15 years?

Yes, gently. She mentions reading a memoir that made her realise she was not alone. This is a positive catalyst worth acknowledging: 'It sounds like that book was a turning point for you.' Understanding what shifted her thinking helps you maintain her motivation for treatment, which is especially important given the long wait times for specialist services. However, do not press too hard or turn it into an interrogation — she has made a brave decision and needs reinforcement, not analysis.