Chronic Illness and Eating Disorders: Why the Risk May Be Higher
Living with a chronic health condition can change almost every part of your relationship with your body. Fatigue, pain, nausea, digestive symptoms, medication effects and unpredictable changes in functioning can all make eating more complicated.
For some people, these challenges contribute to disordered eating or an eating disorder. This does not mean that chronic illness automatically causes an eating disorder. Rather, the physical demands of illness, medical advice, food restrictions and emotional impact of living in an unpredictable body can create additional vulnerability.
How can chronic illness affect eating?
Chronic health conditions can make eating physically and practically difficult. Someone experiencing chronic fatigue, for example, may not have enough energy to shop, prepare meals, sit upright to eat or clean up afterwards.
Other symptoms may include:
Reduced appetite or nausea
Pain associated with eating
Difficulty chewing or swallowing
Digestive discomfort
Sensory sensitivities
Feeling full very quickly
Forgetting to eat because of fatigue or brain fog
Avoiding food because symptoms feel unpredictable
Relying on a very limited range of manageable foods
Research involving young people with ME/CFS has identified difficulties including reduced appetite, nausea, abdominal pain, altered taste and smell, fatigue during eating and limited energy for food preparation (Harris et al., 2016). These difficulties may result in inadequate nutrition even when there is no fear of weight gain or desire to lose weight.
When eating becomes highly medicalised
Some chronic conditions require people to monitor ingredients, symptoms, medications or meal timing. This may be medically necessary, but it can also make food feel stressful or unsafe.
Repeated elimination diets, changing medical advice and pressure to find the “perfect” diet can contribute to:
Fear of certain foods
Increasing dietary restriction
Rigid food rules
Constant monitoring of bodily symptoms
Anxiety about eating something “wrong”
Difficulty distinguishing medical needs from eating-disorder fears
Research has found elevated rates of disordered eating across several diet-related chronic illnesses, particularly where treatment involves ongoing attention to food and weight. Disordered eating is also frequently identified among people with gastrointestinal conditions, although symptoms of physical illness and eating disorders can overlap and require careful assessment.
Grief, body image and loss of trust
Chronic illness can change body shape, weight, mobility, appearance and physical capacity. It can be painful to feel that your body no longer behaves in the way it once did.
Some people experience:
Grief for their previous health or independence
Anger or disappointment toward their body
Feeling betrayed by physical symptoms
Pressure to lose weight as a supposed solution to complex symptoms
Shame about needing rest, support or mobility aids
A desire to regain control through food or exercise
Negative body image and dieting are recognised risk factors for disordered eating. For someone living with chronic illness, food restriction or rigid exercise may begin as an attempt to manage symptoms, feel more in control or receive validation from healthcare professionals.
Chronic fatigue is not the same as an eating disorder
It is important not to assume that difficulty eating, appetite loss or weight loss means someone has an eating disorder.
In ME/CFS and other chronic conditions, a person may struggle to eat because they are exhausted, nauseated, unable to tolerate sensory stimulation or physically unable to prepare food. The limited research directly examining ME/CFS and diagnosed eating disorders means clinicians should avoid making broad assumptions. Existing ME/CFS literature includes small clinical reports and qualitative studies rather than strong evidence that eating disorders are universally more common in this population.
A thorough assessment should consider:
Whether restriction is intentional or symptom-driven
Fear of weight gain or body-image distress
Sensory and gastrointestinal symptoms
Food access and preparation capacity
Medication effects
Energy limitations
Swallowing or chewing difficulties
Previous eating-disorder symptoms
Physical illness and an eating disorder can also occur at the same time. One should not automatically be used to dismiss the other.
What can help?
Coordinated healthcare
Support may involve a GP, relevant medical specialist, eating disorder-informed psychologist, dietitian and occupational therapist. Communication between providers can reduce conflicting advice and help distinguish genuine medical needs from increasingly rigid or distressing food rules.
Practical support with nourishment
Sometimes the biggest barrier is not a lack of knowledge; it is a lack of energy.
Helpful adjustments may include:
Easy-to-prepare or ready-made meals
Keeping food near resting areas
Eating smaller amounts more regularly
Using seated meal preparation
Grocery delivery
Support from family, carers or disability services
Choosing accessible foods without judging them as less “healthy”
Adequate nourishment is more important than achieving an idealised or perfectly varied diet.
Flexible, non-judgemental nutrition care
Nutrition advice should account for fatigue, pain, sensory needs, finances and actual functional capacity. Highly restrictive plans may be inappropriate for someone already struggling to eat enough.
A dietitian familiar with both chronic illness and eating disorders can help establish which restrictions are medically required and where greater flexibility may be possible.
Psychological support
Therapy may help with:
Grief and adjustment to illness
Body-image changes
Fear of symptoms after eating
Perfectionism and all-or-nothing thinking
Medical trauma
Shame about reduced functioning
Rebuilding trust in the body
Expanding coping strategies beyond food control
The aim is not to suggest that physical symptoms are psychological. It is to support the emotional impact of living with symptoms while taking the illness seriously.
When should I seek additional support?
Consider speaking with an eating disorder-informed professional if you notice:
Your safe-food or preferred foods list becoming increasingly narrow
Fear or guilt becoming the main reason you avoid food
Frequently skipping meals even when food is available
Binge eating after periods of restriction
Significant distress about weight or body changes
Compulsive exercise despite pain, fatigue or medical advice
Avoiding appointments because you fear being weighed
Food and body thoughts taking up much of your day
At recoverED clinic, we recognise that chronic illness can make eating, body trust and recovery more complex. Support should be realistic, accessible and adapted to the body you are living in, not based on expectations that ignore pain, fatigue or disability. Contact Us to see if our approach may be right fit for you.
Disclaimer
This blog is for general educational purposes only and does not constitute medical, psychological, diagnostic, or therapeutic advice. It should not be relied upon as a substitute for personalised care from a qualified health professional.
Reading this blog does not create a psychologist–client relationship with recoverED Clinic or its clinicians. If you have concerns about your mental health, eating behaviours, physical health, or safety, please seek professional support. In an emergency, call 000 or attend your nearest emergency department. You can access a list of Australian crisis Helpines here.
This blog was created with the support of AI tools for clarity and structure and has been reviewed and edited by our team.
