How Hunger and Hydration Affect Autistic Behavior

For many parents of children with autism spectrum disorder (ASD), a sudden behavioral meltdown or a period of irritability can sometimes seem to come out of nowhere.

Their child may look happy, content and engaged in play one moment and then become overwhelmed and frustrated the next. When this happens, parents may want to look for complex social or environmental triggers.

Sometimes, though, the answer is simply that the child needs biological regulation.

Hunger and hydration play a massive role in how people regulate their emotions and focus. Just think of a time when you were “hangry” and exhibited certain irrational behaviors when you were hungry or thirsty.

For children with autism, these effects are magnified. By understanding how an empty stomach or hunger impact behavior, we can better support children with autism to stay regulated and ready to learn.

In this article, we’ll discuss how hunger and hydration affect autistic behavior, and how applied behavior analysis (ABA therapy) can help.

Table Of Contents

Understanding the ‘Hidden Sense’ of Interoception

Interoception is often referred to as the eighth sense. This is the sense that allows us to feel what is happening inside our bodies.

It includes signals such as a racing heart, a full bladder or the feeling of hunger.

Many children on the autism spectrum experience interoceptive hyposensitivity. This means they may not actually feel hungry or thirsty until they are at a point of physical exhaustion or extreme discomfort.

Because they have trouble communicating this internal distress early on, it often manifests as problem behavior.

ABA therapy views these behaviors as a form of communication. In other words, the child is just reacting to a physical need they don’t know how to label.

How Dehydration Affects the Brain

About 75% of the brain is made of water. Studies have shown that even mild dehydration, defined by as little as a 1% to 2% loss of body water, can impair cognitive functions such as short-term memory, alertness and visual-motor tracking.

For a child with ASD who is already working hard to process their world, dehydration adds a significant layer of neurological stress.

When a child is thirsty, their threshold for sensory input drops. A sound they could usually tolerate, for instance, may suddenly become painful, causing them to become aggressive or experience a meltdown.

Proper hydration acts as a buffer, keeping the nervous system more resilient against daily stressors.

Blood Sugar and Emotional Regulation

Everyone gets “hangry” from time to time, but for a child with autism, blood sugar crashes can be particularly disruptive.

Many children on the autism spectrum are picky eaters due to sensory sensitivities. If their diet is heavy in simple carbohydrates or sugars, they may experience a cycle of spikes and crashes.

During a blood sugar crash, the body releases the stress hormones cortisol and adrenaline to compensate.

This “fight or flight” response that follows may lead to …

• Increased repetitive behaviors such as stimming
• Difficulty transitioning between activities
• Reduced patience for challenging tasks
• Physical lethargy or sudden hyperactivity

ABA therapists can use Task Analysis to help families of children with autism to identify these patterns. If a child consistently has a behavioral peak at 11 a.m., you can look to see if they had enough protein at breakfast and/or water since.

Often, a small, high-protein snack can be more effective than any behavioral intervention in that specific moment.

Incorporating Nutrition and Hydration into ABA Therapy Goals

ABA therapy should focus not just on social and academic goals but also self-care and autonomy. Helping a child recognize and respond to their own bodily needs is a critical life skill.

Strategies that can be used to help this include …

• Visual Schedules: Including water breaks and snack times as non-negotiable parts of the day so the child doesn’t have to rely on internal cues
• Visual Check-ins: Using a Body Check chart where a child can point to how their stomach feels (full, empty, hurts, etc.)
• Choice Boards: Giving the child a choice between two healthy, hydrating options to encourage autonomy in their nutrition

Tips for Parents to Create a Regulated Environment

Helping your child stay hydrated and fed requires a proactive approach. Since your child might not ask for a drink, consider …

• The Water Bottle Rule: Keep a favorite sensory-friendly water bottle within sight at all times.
• High-Water Content Foods: If your child resists drinking water, try hydrating foods such as watermelon, cucumbers or oranges.
• Pairing: Pair a highly preferred activity with a fueling moment, such as eating three bits of yogurt and then playing with the iPad.

Blue Gems ABA Supports the Whole Child

At Blue Gems ABA, we know that a child cannot reach their full potential if their basic biological needs aren’t being met. We pride ourselves on looking at the big picture, including sleep, nutrition and hydration, to ensure that our therapy sessions are as productive and positive as possible.

Our clinical teams work hand-in-hand with families to identify the why behind every behavior. By addressing physical setting events such as hunger and thirst, we clear the way for meaningful social and cognitive growth.

To learn more, please contact us today.