Coprophagia, or eating feces, is a form of pica that occurs in some children with autism, and while it’s distressing to witness, it can be addressed through a combination of medical evaluation, behavioral strategies, and environmental changes. The behavior is more common than many parents realize, and it almost always has an identifiable cause, whether medical, sensory, or behavioral. Understanding why your child is doing this is the single most important step toward stopping it.
Why This Behavior Happens
Children with autism who eat feces aren’t doing it to be defiant or provocative. The behavior typically falls into one or more of these categories: sensory seeking, a response to nutritional deficiencies, gastrointestinal discomfort, or a learned behavior pattern that’s being reinforced in ways you might not expect.
Research into the behavioral function of coprophagia in autism suggests it’s often maintained by what behavioral analysts call “automatic reinforcement.” In plain terms, the sensory experience itself (the texture, temperature, or even the smell) provides enough stimulation that the child repeats the behavior regardless of how adults respond. A study published in the Journal of Applied Behavior Analysis found that coprophagia persisted at consistent rates whether a child received attention, had demands removed, was given toys, or was ignored entirely. This tells us that for many children, the behavior isn’t about getting a reaction from you. It’s about how it feels to them.
Nutritional deficiencies, particularly low iron and zinc, can also drive pica behaviors. Children with these deficiencies sometimes develop cravings for non-food items as the body attempts to correct what it’s missing. Gastrointestinal conditions like gastritis, celiac disease, and gut inflammation have also been linked to pica. A proposed model of how pica develops in autism traces a path from persistent mouthing and sensory seeking, through ingestion of harmful bacteria, to gut inflammation, malabsorption, nutritional deficiency, and eventually a self-reinforcing cycle of pica and worsening GI symptoms.
Start With a Medical Workup
Before focusing on behavioral strategies, have your child’s pediatrician run blood work checking for iron and zinc deficiencies. If levels are low, supplementation alone sometimes reduces or eliminates pica. Ask the doctor to also evaluate for gastrointestinal issues. Children with autism have higher rates of GI problems, and a child who can’t verbally communicate stomach pain or discomfort may express that distress through unusual behaviors, including eating feces.
Screening for intestinal parasites is also worthwhile, especially if coprophagia has been happening for a while. Feces can carry bacteria like E. coli, salmonella, and shigella, as well as parasites such as giardia. Hepatitis A and E can also be transmitted through fecal contact. These infections cause diarrhea, abdominal pain, fever, and vomiting. Your child’s doctor should know about the behavior so they can monitor for these complications and treat any existing infections.
Reduce Access to Feces
While you work on longer-term solutions, limiting your child’s physical access to feces is the most immediate thing you can do. Back-zip footed pajamas are one of the most commonly recommended tools. Because the zipper runs down the back, children can’t easily remove the garment or reach into a diaper. Some families use these at night and during naps when supervision is more difficult. You can also find adaptive clothing designed specifically for children who remove their diapers or access their diaper area.
If your child is toilet trained but engages in coprophagia after a bowel movement, supervision during and immediately after bathroom use is essential. Keep the bathroom door open or stay nearby. Prompt handwashing right after finishing, and flush immediately. For children still in diapers, change soiled diapers as quickly as possible to minimize the window of access.
Address the Sensory Need
If sensory seeking is driving the behavior, the goal is to replace feces with something that provides similar intense sensory feedback without the health risks. Feces offers strong input through texture, temperature, and smell. Children who crave that level of stimulation often respond well to alternatives that hit those same channels.
Slime, water bead play, finger painting, and playdough can provide rich tactile experiences. Strong-smelling but safe materials like scented playdough or scratch-and-sniff stickers can partially address the olfactory component. Beyond specific substitutes, building more sensory input into your child’s entire day can reduce the intensity of their seeking behaviors. Swinging, bouncing on a therapy ball, deep pressure from weighted blankets, and rough-and-tumble play all “fill up” the sensory system. An occupational therapist with experience in autism can help you build a sensory diet tailored to your child’s specific profile.
The key is making these alternatives consistently available, especially during times when coprophagia is most likely to happen. If your child tends to engage in the behavior during unstructured downtime, that’s when sensory activities need to be most accessible.
Behavioral Strategies That Work
A formal behavioral assessment, ideally conducted by a board-certified behavior analyst (BCBA), is the gold standard for developing an intervention plan. The assessment identifies the specific function the behavior serves for your child and designs a plan around that function. What works for a child seeking sensory input will differ from what works for a child whose behavior is tied to a routine or environment.
One effective approach involves gradually shaping new routines. If your child has a predictable pattern around bowel movements, you can use that predictability to redirect the sequence. For example, if a child consistently has a bowel movement in a pull-up while standing in a specific location, a gradual shaping plan might slowly move the location closer to the bathroom, then onto the toilet with the pull-up still on, then with the pull-up pulled down, and finally without it. Each step is reinforced with something your child finds highly motivating. This type of plan typically needs at least three weeks at each step before you can judge whether it’s working.
Collecting data matters more than you might think. Track when the behavior happens, what preceded it, what time of day it occurs, and what happened afterward. Two weeks of baseline data gives you and any professionals working with your child a clear picture of patterns. You may discover the behavior clusters around specific times, settings, or events, which makes intervention far more targeted.
Reinforcement of alternative behaviors is more effective than punishment. When your child uses the toilet appropriately, engages with a sensory alternative, or allows a diaper change without resistance, immediate and enthusiastic reinforcement builds the competing behavior. The reinforcer needs to be something your child genuinely values, whether that’s a preferred snack, screen time, a favorite toy, or verbal praise.
Cleaning Up Safely
When incidents happen, and they will during the process, protecting yourself and your child from infection requires a consistent cleanup routine. Wear disposable gloves every time. Wash any soiled clothing or linens in a pre-wash cycle first, then run a regular wash cycle with detergent on the warmest temperature the fabric allows. Dry on the highest safe heat setting. After handling soiled items, remove gloves, bag them, and wash your hands thoroughly with soap and water.
For surfaces, a disinfectant effective against bacteria and parasites is important. Clean the area of visible matter first, then apply disinfectant and let it sit for the contact time listed on the label. Keep cleaning supplies stocked and accessible so you can respond quickly without scrambling.
Building a Support Team
This behavior rarely resolves with a single strategy. The most successful outcomes involve a team approach: a pediatrician or gastroenterologist addressing medical factors, a BCBA designing and monitoring a behavioral plan, and an occupational therapist providing sensory strategies. If your child is in school, their individualized education program (IEP) can include behavioral goals and supports related to this issue.
Many parents feel isolated by this behavior because it carries a level of stigma that makes it hard to discuss openly. Online communities for parents of children with autism and pica can provide both practical tips and emotional support from people who genuinely understand. The behavior is not a reflection of your parenting. It’s a complex issue with biological and neurological roots, and with the right combination of interventions, most families see significant improvement.