If you’re trying to understand what causes ARFID, the acronym for Avoidant/Restrictive Food Intake Disorder, there’s also a decent chance another question is hanging out in your head:

Did I cause this?

If you’re a parent, maybe you’re replaying toddlerhood, wondering whether you introduced enough foods, pushed too hard, didn’t push enough, made too many backup meals, cut the crusts off too often, or somehow missed the exact magical feeding strategy that would have prevented all of this.

You didn’t.

And if you’re an adult with ARFID, you may have spent years being told you were picky, dramatic, difficult, stubborn, or that “you’d eat if you were really hungry.”

Not true. 

ARFID isn’t a parenting failure, nor something you could have fixed by “just trying more foods.”

If you’re new here, I’m Marissa, and I’ve been practicing as a dietitian since 2009. I specialize in metabolic health, chronic dieting, and eating disorders, including restrictive eating, binge eating, ARFID, disordered eating, and feeding concerns in children, adolescents, and adults.

My goal is to make this make sense for you. To be honest, even after years of treating children and adults with ARFID, sitting down to write this blog helped things click into place for me in a new way. And I want that for you, too. 

ARFID is genuinely complicated. I want you to walk away from this blog understanding it better than you did five minutes ago. By the end, you’ll have a real picture of what causes ARFID, what makes someone more vulnerable to it, why it looks so different from one person to the next, and when it’s time to get specialized help.

First, what is ARFID?

ARFID stands for Avoidant/Restrictive Food Intake Disorder. It is an eating disorder where someone does not consume enough food, enough variety of food (or both) to adequately meet their needs.

Unlike other eating disorders, the restriction in ARFID is not primarily driven by a desire to lose weight or change one’s body shape.

To meet diagnostic criteria for ARFID, restrictive eating must have a meaningful impact. This may include one or more of the following:

• significant weight loss or difficulty achieving expected growth
• a significant nutritional deficiency
• reliance on oral nutrition supplements or enteral feeding
• substantial interference with everyday or social functioning

In my professional experience, my clients usually do NOT have all of the above bullet points.  

As an example, someone may be growing just fine, might not experience significant nutritional deficiencies, but does have substantial disruption to school, work, travel, relationships, family meals, or social activities due to their limited food intake.

On the other hand, someone might have significant nutritional deficiencies even while living in a wide range of body sizes.

To get a diagnosis, you’ll need to be assessed by a mental health therapist who specializes in eating disorders. You cannot self-diagnose ARFID.

ARFID also doesn’t discriminate by age. Although it often begins earlier in life, adults can live with longstanding ARFID or develop symptoms later.

So, what causes ARFID?

The more you go down the rabbit hole of what causes ARFID, the more you’ll see that researchers are still working on exactly why it develops.

From what we know now, it’s accurate to think about ARFID as multifactorial, rather than searching for one single cause.

This was the first thing that really clicked for me as I was writing this: the “cause” of ARFID isn’t one thing. To boot, the reason it persists might not always be related to the cause.  

A child may start out with sensory sensitivity. Someone else may have one frightening choking or vomiting experience. Another person may simply have very little appetite. But over time, anxiety, avoidance, limited food variety, and repeated negative experiences can start reinforcing one another.

Per the DSM-5-TR (the manual clinicians diagnose from), it doesn’t name a single cause either. 

Instead, research suggests ARFID develops through a mix of biology, temperament, sensory wiring, appetite regulation, anxiety, neurodevelopment, medical or GI experiences, and what someone learns from their experiences with food. Oof, that’s a lot (1, 2).

I also find it helpful to distinguish between the causes and risk factors for ARFID and the way ARFID presents.

As an example, you will often hear ARFID described according to three main presentations:

1. sensory sensitivity
2. lack of interest in food or eating
3. fear of something bad happening when they eat, such as choking, vomiting, pain, or an allergic reaction. 

These are not necessarily three separate disorders, and they are also not three simple causes. But they do describe common reasons a person may avoid or restrict food, and how it presents. As well, many people experience more than one of them. You can dive deeper into the different types of ARFID here in this blog post.

Here, we will look more closely at some of the factors that can contribute.

1. Sensory sensitivity can make eating genuinely difficult.

For some people with ARFID, food can be an incredibly intense sensory experience. This is especially true for those who have sensory processing disorder (SPD). Texture is often the first thing people think about, but food provides sensory information in many different ways:

• taste
• smell
• temperature
• appearance
• texture
• sound (a crunchy raw carrot or potato chip)
• consistency

A food that feels completely ordinary to one person may feel extremely unpleasant, unpredictable, or even intolerable to someone with heightened sensory sensitivity.

This helps explain why a child may tolerate Goldfish crackers but reject Annie’s cheddar bunnies even if they look virtually identical. Or why a food can be prepared one way, but that same exact food prepared slightly differently isn’t possible for someone to eat. 

It can also explain why simply telling someone to “just take one bite” isn’t a helpful recommendation.

There needs to be a way to break through the initial sensory threat. Ironically, repeatedly avoiding sensory experiences can gradually lead to an increasingly narrow range of accepted foods.

So how do you begin to break through this? 

Well, sensory sensitivity is one of the most commonly recognized ARFID presentations, especially when food selectivity has been there since early childhood. So no, the answer usually isn’t “just make them take a bite.” Effective support involves thoughtful, repeated food exposures that help someone build familiarity and tolerance while reducing the avoidance that has made those foods feel impossible to begin with (3).

But sensory sensitivity alone does not automatically mean someone has ARFID.

Many people have sensory preferences or selective eating without meeting criteria for an eating disorder. The degree of restriction and, importantly, the consequences of that restriction help distinguish ARFID from less clinically significant food selectivity.

I’ll be exploring that difference more fully in ARFID vs. Picky Eating: How to Tell When Selective Eating May Be Something More.

2. A frightening experience with food can trigger avoidance.

Sometimes there is a much clearer beginning.

A person may have:

• choked on food
• vomited during or after a meal
• had a severe stomach illness
• experienced an allergic reaction
• had significant reflux
• felt intense nausea or abdominal pain
• had difficulty swallowing

Afterward, the brain understandably learns: eating might not be safe.

The person may begin avoiding the food involved in the original experience. Then they may avoid foods that look similar. Eventually, they may begin avoiding entire textures, food groups, restaurants, or eating situations.

For example, I had a client who once choked on a piece of meat, so he initially stopped eating steak. Then other meats started to feel more dangerous. Then chewy foods began to feel unsafe. Eventually, the number and types of foods he felt comfortable eating became increasingly limited.

This pattern is often described as “fear of aversive consequences,” one of the three commonly recognized ARFID presentations. Even if it may not happen, these are valid fears that include choking, vomiting, pain, allergic reactions, or other negative physical consequences of eating certain types of foods.

The original fear may have been completely understandable. The problem is that avoidance can continue long after the immediate danger has passed.

3. Some people experience very little interest in food or eating.

Not everyone with ARFID is afraid of food or bothered by its texture. Some people simply experience eating very differently.

They may:

• rarely feel strongly hungry
• become full very quickly
• forget to eat
• eat very small portions
• take a long time to finish meals
• find eating boring or inconvenient
• describe food as a chore

This is commonly referred to as the lack-of-interest presentation of ARFID. And it may or may not overlap with other neurodevelopmental concerns.

That can be hard for other people to understand, particularly in a culture where food is often assumed to be naturally motivating.

“You must be hungry by now” doesn’t necessarily mean that hunger will feel strong enough to drive adequate eating. And “they’ll eat when they’re hungry” can be particularly unhelpful when someone’s ability to recognize or respond to appetite cues isn’t functioning the way you’d expect it to.

Over time, consistently eating too little can also complicate appetite regulation further, which is why establishing adequate and reliable nutritional intake is an important part of ARFID treatment.

4. Anxiety may increase vulnerability to ARFID.

ARFID frequently co-occurs with anxiety disorders, although having anxiety does not mean someone will develop ARFID.

Researchers are still working to tease apart these relationships.

For some people, anxiety may increase hypervigilance around physical sensations or certain foods. As an example, someone may be especially alert to a feeling in their throat, or a small change in a food’s texture. Or they might feel anxious about a sensation of fullness, or the possibility of nausea.

I had a client with fear-based anxiety, where there were concerns about choking, vomiting, or other consequences of eating. This is a pretty common experience for those with this type of ARFID. Other forms of anxiety may also contribute to poor appetite or increased attention to sensory aspects of food.

Once again, this doesn’t mean anxiety causes ARFID. But anxiety can be one part of a larger picture.

5. Autism, ADHD, and other neurodevelopmental differences  

ARFID and neurodevelopmental conditions frequently overlap.

In particular, research has found an association between autism and ARFID; specifically, a 2025 meta-analysis found significantly higher co-occurrence of autism and ARFID (4).

There are several possible reasons for this overlap.

Autistic people may experience:

• heightened sensory sensitivity
• a stronger preference for predictability or sameness
• difficulty tolerating unexpected changes in food
• differences in how internal body sensations are experienced or interpreted
• gastrointestinal concerns (such as constipation, reflux, stomach pain, nausea, or bloating)
• highly specific food preferences

But we don’t want to collapse the two diagnoses. Autistic eating differences are not automatically ARFID, and ARFID does not mean someone is autistic.

Similarly, ADHD can interact with eating through differences in attention, executive functioning, remembering to eat, planning meals, sensory experiences, or appetite.

The question is still whether the eating restriction has become clinically significant enough to meet criteria for ARFID.

6. Medical and gastrointestinal problems can complicate things.  

ARFID assessment shouldn’t begin and end with someone’s food list.

Eating may genuinely be uncomfortable because of an underlying medical condition. As an example, if you have gastrointestinal pain, reflux, constipation, nausea, a food allergy, swallowing difficulty, or other conditions, this can literally make eating harder.

This makes perfect sense. If eating repeatedly results in pain or nausea, avoiding food is a very understandable response.

But there are situations in which the medical issue improves while the learned fear and avoidance around food remain. I had a client once who developed gastritis and, understandably, began avoiding foods she associated with pain and nausea. Even after the gastritis improved, eating still felt unsafe. Her stomach had healed faster than her brain had learned to trust food again. 

There are also situations in which ARFID and an ongoing medical problem coexist. Someone may still have reflux, GI pain, allergies, swallowing concerns, or another condition that makes eating legitimately harder, while also developing fear, avoidance, or restriction that has taken on a life of its own. 

This is why good ARFID care comes from a team. It may involve coordination among a physician, dietitian, therapist, and, depending on the concern, other professionals such as a gastroenterologist, allergist, occupational therapist, or speech-language pathologist.

7. Learning and avoidance can reinforce each other.

Avoidance works remarkably well in the short term.

If a food makes you anxious and you do not eat it, your anxiety often decreases.

If a texture makes you gag and you remove it from your plate, the sensory discomfort goes away.

If eating makes you afraid you will vomit and you skip the meal, you don’t have to sit with that fear.

So the brain learns: wow! Avoiding this helped me feel better. Let’s do that again.

Nervous systems are very good at learning from experiences and repeating behaviors that appear to keep us safe.

Unfortunately, repeated avoidance can make the feared or unfamiliar food feel even harder to approach over time.

This is also why telling someone to “just eat it” misses much of what is actually happening.

It’s usually more than one cause.

Parents often come into my office convinced they did something wrong, or missed something early on, that created this. In reality, ARFID is almost always a few of these factors interacting (and not the parents’ fault, at all). 

A sensory-sensitive kid has a scary choking episode. Or an anxious adult with low appetite slowly narrows their diet during a stressful year. The causes compound, which is exactly why the fix isn’t as simple as “just try new foods.” 

You have to figure out which threads are actually pulling.

That is the cycle that clicked for me: one vulnerability can lead to avoidance, avoidance can narrow eating, anxiety can spread, and the strategies that keep someone nourished in the short term can sometimes make flexibility harder to rebuild later.

Did my parenting cause ARFID?

For parents reading this, I want to address this question, because it comes up.

ARFID is not proof that you failed at feeding your child.

Researchers do not understand ARFID as something caused by one “bad” parenting decision or by failing to introduce enough vegetables during toddlerhood. Instead, we are learning how ARFID can occur with complex interactions, including biological, psychological, sensory, and environmental factors – whew (2).

At the same time, the feeding environment can matter once eating difficulties are present.

When a child eats very little, parents understandably start trying to get food into them.

You might:

• make a separate meal
• encourage “just one bite”
• negotiate
• reward eating
• remove foods they consistently reject
• serve the one thing you know they’ll eat
• follow them around with snacks
• become visibly worried when they don’t eat

Those responses often arise because a parent recognizes, correctly, that their child needs food.

However, over time these strategies can backfire. The same pressure to take a bite or make a separate meal can contribute to the cycle going on and on. 

We really have to understand the entire feeding system well enough to determine what actually needs to change.

Are there different types of ARFID?

You may hear people talk about three “types of ARFID.”

As mentioned earlier, these are better understood as three common presentations or drivers:

Type 1: Sensory sensitivity

Eating is restricted because certain tastes, textures, smells, appearances, or other sensory properties feel intolerable.

Type 2: Lack of interest in food or eating

The person has little appetite or motivation to eat and may struggle to consume enough food.

Type 3: Fear of aversive consequences

Eating becomes associated with feared experiences such as choking, vomiting, pain, or allergic reactions.

These patterns can overlap. Someone might have been extremely sensitive to texture since childhood and later develop a fear of choking. Another person may have very little interest in eating but also become increasingly dependent on a small number of predictable foods.

Not every form of ARFID should be treated exactly the same way, so we do need to know which presentation they have. I go much deeper into this in the next article in this series:

Types of ARFID: Understanding the Three Main ARFID Presentations

Is ARFID just really severe picky eating?

No, although the two can sometimes look similar from the outside.

A child who eats a limited number of foods does not automatically have ARFID.

Likewise, there is no magic number of accepted foods that separates “picky eating” from an eating disorder.

ARFID is distinguished by the clinical impact of the restrictive eating.

That may mean a person’s food intake is affecting nutrition or growth. Or it might mean they depend on supplemental nutrition. Or the eating difficulty may substantially interfere with everyday life.

Think about a child who cannot eat at school, attend sleepovers, go to camp, travel, eat at restaurants, or comfortably participate in birthday parties because there is rarely a food they can manage.

Or an adult who plans their work travel around access to a handful of safe foods, avoids dating because eating at restaurants is too stressful, or is meeting energy needs but has significant nutritional deficiencies because their dietary variety is extremely limited.

Those situations tell us much more than simply counting how many foods someone eats.

I’ll unpack this distinction in detail in this future article:

ARFID vs. Picky Eating: How to Tell When Selective Eating May Be Something More

FAQ about ARFID

Is ARFID caused by trauma?
Sometimes a frightening eating-related experience, like choking, severe vomiting, pain, or an allergic reaction, can trigger fear and avoidance around food. But ARFID is not always trauma-based. For many people, sensory sensitivity, low interest in eating, anxiety, neurodevelopmental differences, or several factors together play a bigger role.

Can adults develop ARFID, or is it just a childhood thing?
Adults can absolutely have ARFID. It often begins in childhood and continues into adulthood, but symptoms can also emerge or become more noticeable later in life, especially after a difficult medical or eating-related experience.

Is ARFID the same as being a picky eater?
No. Picky eating and ARFID can look similar on the surface, but ARFID involves restriction that has a meaningful impact on nutrition, growth, reliance on supplements, or everyday functioning. There also isn’t a magic number of accepted foods that separates picky eating from ARFID. Read my future article: ARFID vs. Picky Eating for a fuller comparison.

Does ARFID ever go away on its own?
ARFID symptoms can change over time, and some people improve as they get older. But when eating restriction is affecting nutrition, growth, health, or daily life, it is worth getting support rather than waiting and hoping for the best – it is too risky. Treatment is most useful when it addresses what is actually driving the restriction.

Is ARFID my fault as a parent?
No. ARFID is a recognized eating disorder with multiple possible biological, psychological, sensory, medical, and environmental contributors. Parenting choices do not single-handedly cause ARFID. Parents can absolutely become part of the treatment process, but that is very different from saying they caused the disorder.

Can ARFID get better?

Yes. ARFID is treatable, although treatment looks different depending on age, medical status, nutritional needs, and the factors driving the eating difficulty. Research on ARFID treatment is newer than the evidence base for several other eating disorders, but specialized approaches are continuing to develop for children, adolescents, and adults.

How do I start looking for an ARFID specialist near me?
Start by looking for a provider who specifically lists experience with ARFID, restrictive eating, or feeding disorders rather than general nutrition or eating disorder care alone. Depending on the situation, your care team may include a dietitian, therapist, physician, occupational therapist, or speech-language pathologist.

How do I know if an ARFID specialist is the right fit?
Ask about their experience with ARFID, the age groups they work with, and how they approach sensory sensitivity, low appetite, or fear around eating. A good fit should also be comfortable coordinating with other providers when medical, swallowing, gastrointestinal, or mental health concerns are part of the picture.

And because ARFID can look so different from one person to another, good treatment starts with understanding the person rather than forcing everyone through the same food-exposure checklist.

The bottom line: there isn’t one cause of ARFID

If you came here wondering what causes ARFID, the most important thing to know is that there usually isn’t one simple explanation.

As you learned in this blog, ARFID can emerge from an interaction among sensory differences, appetite and interest in food, fear and anxiety, learning experiences, neurodevelopmental differences, medical experiences, and other individual vulnerabilities.

For some people, the restrictive eating has existed for as long as anyone can remember. For others, you can almost pinpoint the day things changed.

And for many, several factors overlap.

Understanding those differences helps determine what kind of treatment is likely to be useful.

Looking for ARFID nutrition support?

If you or your child is struggling with significant food restriction, you don’t have to determine the cause or diagnosis on your own.

At REVV Health, I provide eating-disorder-informed nutrition counseling for children, adolescents, and adults experiencing ARFID, significant food selectivity, and other forms of restrictive eating.

Nutrition care looks at the whole picture: nutritional adequacy, eating patterns, growth and medical history when relevant, sensory barriers, appetite, food fears, family feeding dynamics, and the impact eating is having on everyday life.

Learn more about ARFID nutrition counseling at REVV Health and how to get started.

This article is for educational purposes and is not intended to diagnose ARFID or replace individualized medical, nutrition, or mental health care.