I don't Want to Eat Anymore: Hypermobility, Neurodivergence and Eating Disorders

When we talk about eating disorders, the conversation often begins with psychology. We think about body image, fear of weight gain, control, anxiety or trauma.

These factors matter, but they do not explain every pattern of restrictive eating. They also do not necessarily tell us what happened before a person became traumatized of food, developed rigid eating behaviours or began losing weight.

For some hypermobile and neurodivergent people, eating difficulties may begin in the body. Food can cause pain, nausea, reflux, dizziness, exhaustion, uncomfortable fullness or unpredictable reactions. The nervous system then learns from these experiences. Foods, smells, internal sensations and situations associated with previous symptoms may begin to feel unsafe.

Over time, a physical problem can become a self-reinforcing pattern involving anticipation, avoidance, reduced nutrition and increasing difficulty tolerating food.

The psychological consequences are real, but they may not be the beginning of the story.

Instead of asking only, “Why is this person not eating?”, we also need to ask:

“What happens in their body when they try?”

How eating difficulties can develop

There is no single pathway linking hypermobility, neurodivergence, and eating disorders. Instead, several physical and neurological processes can build on one another until eating gradually becomes more difficult, more unpredictable, and eventually something the body begins to avoid.

When eating causes physical distress

For some hypermobile and neurodivergent people, eating itself can become physically difficult. Gastrointestinal symptoms, autonomic reactions, severe fatigue, or pain affecting the abdomen, jaw, throat, or chest can turn something that should nourish the body into an unpleasant or traumatizing experience.

These symptoms may arise from gastrointestinal dysfunction, swallowing difficulties, autonomic problems, food allergy, coeliac disease, inflammatory conditions, mast-cell activation, or, less commonly, structural and vascular conditions such as median arcuate ligament syndrome (MALS).

At this stage, eating less is often a practical attempt to reduce physical distress rather than a desire to lose weight.

How the nervous system learns to avoid food

Repeated discomfort changes how the nervous system responds to food. Instead of signalling nourishment, food begins to predict pain, nausea, dizziness, or loss of function.

This learning often happens outside conscious awareness. The sight, smell, or anticipation of a meal may trigger nausea or loss of appetite before eating even begins. If avoiding food reduces symptoms, even temporarily, the nervous system reinforces that strategy.

What began as a physical problem gradually becomes a learned protective response.

Autonomic dysfunction adds another layer

For people with autonomic dysfunction, meals may be followed by dizziness, palpitations, nausea, weakness, or brain fog. Eating can become associated with feeling less able to function, making smaller meals or delayed eating understandable adaptations rather than irrational behaviours.

Autonomic symptoms, gastrointestinal problems, and fatigue have all been reported at higher rates in hypermobile people with eating disorders.

Immune reactions make food less predictable

Food may also trigger allergic, inflammatory, or mast-cell-related reactions. When symptoms vary depending on the food, stress, illness, or other triggers, eating becomes less predictable, encouraging avoidance of foods that feel unsafe. One day you might react to tomatoes and another day tomatoes feel ok. It might look irrational or fake but it is actually relating to histamine levels in your body. Since food, like tomatoes, can be high in histamine so on days where you're already flaring, you can be more sensitive to high histamine food than usual. The unpredicability can make it hard for patients to be heard and believed even though what they are experiencing makes biological sense once understood.

Although the relationship between hEDS or HSD and mast-cell activation disorders is still being investigated, repeated multisystem reactions deserve appropriate medical assessment rather than being dismissed as anxiety.

Fatigue reduces the ability to recover

Fatigue affects much more than cooking. It reduces the energy needed to choose food, begin eating, chew, remain upright, and tolerate the physical demands of a meal. As nutritional intake falls, fatigue often worsens, making regular eating increasingly difficult.

Interoception makes body signals harder to trust

Interoception helps us recognise hunger, fullness, thirst, nausea, pain, and other internal signals. In some hypermobile and neurodivergent people, these signals may be delayed, unusually intense, or difficult to interpret. Hunger may first appear as weakness, dizziness, irritability, or nausea, while fullness may feel sudden or overwhelming.

Rather than failing to listen to the body, the body itself may be sending confusing information. Hence, learning to pace ourselves and have a predicatible food routine can help us avoid sudden crashes or even eating too much.

Sensory processing becomes part of threat prediction

Sensory processing is not simply about liking or disliking certain foods. The nervous system uses sensory information to predict what is about to happen. When smells, tastes, textures, or internal sensations have repeatedly been paired with pain or illness, they can become warning signals.

For neurodivergent people, these sensory cues may also be experienced more intensely, making eating physically and emotionally overwhelming. Research has found differences in both external sensory processing and the perception of internal bodily signals across eating-disorder populations.

Predictability becomes protective

When food becomes unpredictable, predictability becomes protective. Familiar foods, routines, and eating environments reduce uncertainty and lower the chance of unpleasant symptoms. Over time, however, the list of safe foods may become increasingly restricted.

Executive functioning increases the challenge

All these factors increase the mental effort required to eat. Planning meals, remembering safe foods, anticipating symptoms, and deciding whether eating feels manageable all rely on executive functioning. For someone already dealing with pain, fatigue, or sensory overload, these demands can become another barrier to adequate nutrition.

None of these mechanisms acts in isolation. Together, they can transform eating from a source of nourishment into an activity the body learns to approach with caution, creating the conditions in which restrictive eating can gradually develop.

What does the research show?

Research is still developing, but the available evidence suggests that the overlap between hypermobility, neurodivergence, and eating disorders is too consistent to ignore.

In a study of 680 people with hEDS or HSD, 62.1% had changed their diet during the previous year and 62.3% regularly skipped meals, with dietary changes associated with reflux, functional dyspepsia, and features of avoidant or restrictive eating. These figures do not mean that 62% had a diagnosed eating disorder, but they highlight how common significant disruption around food is within this population.

Research involving women with EDS has also found higher rates of gastrointestinal symptoms, food allergies or intolerances, previous eating disorders, current eating-disorder risk, and lower BMI compared with control participants.

The overlap is not limited to gastrointestinal symptoms or ARFID. Joint hypermobility has also been reported more frequently in people with anorexia nervosa.

In one small study, joint hypermobility was identified in 63% of people with anorexia nervosa, compared with 34% of their first-degree relatives and 13% of control participants.

A later study of people receiving treatment for eating disorders found generalised joint hypermobility in 41% of participants, compared with an estimated 20% in the general population. Although these studies were relatively small, they suggest that the relationship deserves further investigation.

Research has also consistently found higher rates of autism among people with anorexia nervosa, while autistic people are significantly more likely to meet the criteria for avoidant/restrictive food intake disorder (ARFID). These findings suggest that neurodivergence is not simply associated with hypermobility, but is also independently linked to patterns of restrictive eating.

Although these studies examined different populations and outcomes, they point towards the same conclusion:

• Eating and nutritional disruption are common in people with hypermobility and neurodivergence.

• Joint hypermobility appears more frequently in some eating-disorder populations.

• Shared physical mechanisms, including gastrointestinal symptoms, pain, dysautonomia, fatigue, and differences in sensory and interoceptive processing, may help explain part of this overlap.

None of these studies proves that hypermobility or neurodivergence directly causes an eating disorder. Together, however, they challenge the idea that eating disorders should be understood through psychology alone and support a broader, whole-person approach to assessment and treatment.

When the cycle becomes self-reinforcing

What often begins as a practical response to physical symptoms can gradually become a self-reinforcing cycle.

A person experiences pain, nausea, dizziness, fatigue, or another distressing symptom after eating. To avoid those symptoms, they begin eating less, delaying meals, or restricting certain foods. This may provide short-term relief, but over time reduced nutritional intake can worsen gastrointestinal function, autonomic instability, fatigue, pain sensitivity, concentration, emotional regulation, and the body's ability to recognise hunger and fullness.

The next meal may then become even harder to tolerate.

At this stage, physical symptoms and restrictive eating begin reinforcing one another. What started as a response to genuine physical distress may now also involve anticipation, anxiety, rigid routines, and learned fear around food.

By this point, asking whether the problem is "physical" or "psychological" misses the bigger picture. The two have become deeply interconnected.

Why the first questions matter

When someone is restricting food, losing weight or avoiding entire food groups, it is not enough to ask whether they are worried about their appearance. We also need to ask:

• What happens physically during or after eating?

• Were pain, gastrointestinal symptoms, dizziness or food reactions present before the restriction began?

• Are chewing and swallowing comfortable?

• Can the person recognise hunger, fullness and thirst reliably?

• Do meals cause a loss of energy or ability to function?

• Have particular smells, tastes or bodily sensations become associated with previous pain or illness?

• Does the person rely on predictable foods because other foods produce uncertain consequences?

• Do fatigue or executive-function demands prevent them from starting or completing meals?

• When did concerns about weight or body shape appear in relation to the physical symptoms?

• Is the person avoiding food because of weight gain, because of an expected physical consequence, or because the two have become connected?

These questions do not replace eating-disorder assessment or psychological support. They make the assessment more accurate.

Medical, nutritional, gastrointestinal, autonomic, immune, neurodevelopmental and psychological factors may need to be considered at the same time. Physical investigation should not begin only after psychological treatment has failed.

Looking at the whole picture

An eating-disorder diagnosis describes the pattern that has developed. It does not automatically explain how that pattern began.

For hypermobile and neurodivergent people, restrictive eating may arise through many interacting pathways. Pain, gastrointestinal symptoms, autonomic dysfunction, sensory processing, interoception, fatigue, immune reactions, and psychological factors can all influence how a person experiences food. The challenge is not deciding which explanation is correct, but understanding how they fit together.

At ParaMotion, we believe that rehabilitation begins with understanding. The body functions as an interconnected system, not a collection of separate parts. By recognising these connections, we can make informed decisions, move with greater confidence, and build treatment plans that support long-term health rather than simply managing symptoms.

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This article is intended for education and awareness. Significant food restriction, rapid weight loss, fainting, swallowing difficulties, repeated vomiting, breathing symptoms, severe reactions to food, dehydration or signs of malnutrition require appropriate medical assessment.