Pica is treated by addressing its root cause, whether that’s a nutritional deficiency, a sensory need, a mental health condition, or some combination. In many cases, especially when iron deficiency is involved, cravings for non-food items can stop within days of starting the right treatment. The approach depends on who has pica, what they’re eating, and why.
What Counts as Pica
Pica is the persistent eating of non-food, non-nutritive substances for at least one month. Common items include ice, dirt, clay, chalk, paper, paint chips, hair, soap, and cloth. To qualify as a clinical diagnosis, the person must be at least two years old, since mouthing objects is normal in younger toddlers. The behavior also can’t be part of a cultural practice, as some communities have longstanding traditions of eating clay or chalk.
Pica shows up across a wide range of people. It’s common in children, in people with intellectual disabilities or autism, and during pregnancy. It can also co-occur with OCD, schizophrenia, and hair-pulling disorder.
Check for Nutritional Deficiencies First
The single most effective first step is screening for iron deficiency. The link between low iron and pica is strong and well-documented, and correcting the deficiency often eliminates the cravings entirely. In a scoping review of case studies, patients who received intravenous iron reported that their pica resolved within three weeks. Many stopped craving non-food substances by days five through eight of starting iron therapy. That’s remarkably fast for a behavior that may have persisted for months or years.
The most reliable blood test for iron deficiency is serum ferritin, which measures your body’s iron stores. A complete blood count can also reveal anemia. Zinc deficiency is another common finding in people with pica, so most clinicians will check for that as well. Treatment typically involves oral iron supplements, though intravenous iron is used when levels are severely low or oral supplements aren’t absorbed well enough.
If you’re pregnant and experiencing pica, iron-deficiency anemia is the most likely contributor. Prenatal vitamins alone may not be enough if your stores are already depleted, and your provider can adjust your supplementation based on bloodwork.
Behavioral Approaches
When pica isn’t driven by a deficiency, or when it persists after nutritional correction, behavioral treatment becomes the primary strategy. This is especially relevant for children with autism or intellectual disabilities, where pica can be a long-term pattern. A review of 34 treatment studies found strong results: 25 well-designed studies reported at least an 80% reduction in pica behavior, and 21 of those achieved 90% or greater reduction.
Behavioral strategies generally work by redirecting the person toward safe alternatives and reducing opportunities to access harmful items. Specific approaches vary by individual, but the core principles include teaching the person to distinguish between food and non-food items, reinforcing safe eating behaviors, and providing consistent redirection when pica attempts occur.
Sensory-Based Strategies
For many people with autism or sensory processing differences, pica serves a sensory function. The crunch, texture, or taste of a non-food item provides input the person is seeking. Pica also tends to increase during periods of anxiety or sensory overload.
A sensory assessment can help identify what textures and tastes the person is drawn to, which allows caregivers to offer safe substitutes. One practical tool is a “pica box,” a collection of safe items the person can chew, bite, or eat that mimic the sensory qualities of the items they crave. Chewy aids designed for oral stimulation work well for people who seek that kind of input. In one documented case, a person who ate wood was offered Twiglets (a crunchy, stick-shaped snack) as a substitute.
A broader approach called a “sensory diet” provides structured sensory input throughout the day. This might include activities like chewing gum, using vibrating oral tools, handling textured objects, or physical movement. The goal is to lower overall stress and meet sensory needs before the urge to eat non-food items builds. Any strategy that reduces anxiety can be beneficial, since dysregulation is a common trigger.
Making the Environment Safer
While treating the underlying cause, reducing access to dangerous items is critical. This is especially important for people with intellectual disabilities living in group settings, but many of the same principles apply at home.
- Restrict access to trash cans and medical supplies like latex gloves, thermometer covers, and medication cups.
- Choose durable furniture and furnishings made from materials that can’t be easily torn apart, preventing access to screws, bolts, or strips of fabric.
- Use rip-proof covers on mattresses and clothing when needed.
- Shield electronics and fixtures with Plexiglas covers over items like smoke detectors, clocks, and radios that contain small parts.
- Safeguard electrical outlets and keep small electronic devices like phones and MP3 players out of reach when appropriate.
- Limit decorations to items that can’t be broken apart or swallowed.
Environmental modifications don’t treat pica itself, but they prevent the most dangerous consequences while other treatments take effect.
Medication Options
There is no medication specifically approved for pica, and the evidence base is limited. That said, a small number of case reports suggest certain psychiatric medications can help, particularly when pica occurs alongside autism, intellectual disability, or OCD.
In one documented case, a 42-year-old woman with severe intellectual disability, autism, and a long history of eating cigarette butts, socks, and small objects was first tried on an SSRI antidepressant with no effect. When switched to a low dose of the antipsychotic olanzapine, her caregivers noted a marked reduction in pica that held steady for over three years. Aripiprazole, another antipsychotic, has also been reported to reduce pica in an adolescent with autism. Some cases have responded to stimulant medication used for ADHD.
These are isolated case reports, not large trials, so medication is generally not a first-line approach. It’s most often considered when behavioral strategies and nutritional correction haven’t been enough, or when pica is severe enough to pose immediate danger.
Complications That Need Urgent Attention
Pica can cause serious medical emergencies depending on what’s being consumed. The two most dangerous complications are intestinal obstruction and lead poisoning.
Eating large amounts of hair, cloth, or fibrous material can form a mass in the stomach or intestines called a bezoar, which may require surgical removal. Swallowing sharp objects can perforate the digestive tract. Eating paint chips, soil near older buildings, or other lead-containing materials can cause lead poisoning, which damages the brain and nervous system, particularly in children.
If someone with pica develops severe abdominal pain, vomiting, constipation that won’t resolve, or signs of poisoning (confusion, fatigue, irritability, developmental changes in a child), those symptoms need immediate medical evaluation. Part of any pica treatment plan should include identifying exactly what substances the person has been consuming, so clinicians can screen for specific toxicities or obstructions.
Treatment During Pregnancy
Pica during pregnancy is more common than many people realize, and it often goes unreported because of embarrassment. The recommended approach starts with a nonjudgmental conversation about what substances are being consumed and how often. From there, the focus is on harm reduction.
Substitution is a key strategy. If you’re craving dirt or clay, switching to a crunchy, earthy-tasting food may satisfy part of the urge. Decreasing exposure to the craved substance also helps: keeping it out of the home, changing walking routes that pass by trigger locations, or having someone else handle materials you’re tempted by.
Lab work to check iron and other nutrient levels is standard, and correcting any deficiency often resolves the cravings. For most women, pica stops after delivery, but addressing it during pregnancy matters because the substances consumed can harm both the mother and the developing baby.