What Is Pica? Learn About This Rare Eating Disorder

It started with ice. Then chalk. Then one day, a young woman found herself craving the scent of laundry detergent—so much so that she secretly tasted a spoonful when no one was looking. Embarrassed and confused, she didn’t know how to explain what was happening. Was it stress? Pregnancy? Or something more serious, like what is Pica eating disorder, a rare condition that many have never even heard of?

If you’ve ever had an unusual craving or watched a loved one eat something that wasn’t food, you’re not alone in wondering what’s going on. But when these behaviors are persistent, we’re no longer talking about quirky habits—we’re talking about a real, diagnosable condition called Pica.

So, what is Pica, who’s at risk, and how can it be treated—or even prevented?

Let’s break it down.

What Is Pica?

Pica is an eating disorder where someone regularly eats things that aren’t food. We’re not talking about trying a weird snack once on a dare—this is ongoing, repeated behavior that lasts for at least a month and is not appropriate for the person’s developmental level.

According to the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), Pica involves eating non-nutritive, non-food substances like dirt, paper, chalk, hair, or even soap for a period of at least one month, and it’s not part of a culturally supported or socially accepted practice.

And while it might sound rare, Pica affects an estimated 4% to 26% of individuals with developmental disabilities and is also seen in children, pregnant women, and people with mental health conditions like OCD or trauma history.

Everyday Things People with Pica Eat

Not all these substances are immediately life-threatening, but over time, many of them can cause serious harm.

Who’s at Risk for Pica?

While anyone can develop Pica, there are specific groups where it’s more commonly seen:

1. Children

Kids under age 5 often explore the world by putting things in their mouths. But if a child continues eating non-food items past this phase, it might be a red flag.

2. Pregnant Women

Cravings are expected during pregnancy, but when those cravings turn to ice, clay, or even soap, it might signal iron or mineral deficiencies linked to Pica.

3. People with Developmental Disabilities or Autism

Pica is particularly common among individuals with intellectual disabilities or autism spectrum disorder (ASD), where sensory processing differences or communication challenges may play a role.

4. People with Mental Health Conditions

Trauma, stress, obsessive-compulsive disorder (OCD), and anxiety are often associated with Pica, particularly when eating non-food items becomes a coping mechanism.

5. Older Adults

Though rare, some elderly individuals—especially those with dementia—may develop Pica-like symptoms, sometimes as a result of nutritional deficiencies or cognitive decline.

What Causes Pica?

There’s no single cause of Pica. Instead, researchers believe it stems from a mix of biological, psychological, cultural, and environmental factors:

1. Nutrient Deficiencies

Iron, zinc, or calcium deficiencies are commonly linked to Pica. For instance, studies have shown that people with iron-deficiency anemia often crave ice (pagophagia).

If you’re unsure whether low iron could be a factor, these 10 signs that you are deficient in iron can help you spot the warning symptoms early.

2. Psychological Triggers

For some, Pica behaviors start during times of high stress or trauma. The repetitive action of consuming certain substances may provide temporary relief, similar to how some people chew their nails or pull their hair.

There’s even growing research on how gut health can impact anxiety and compulsive behaviors. Learn more about the gut–mind connection here.

3. Cultural Practices

In some cultures, eating clay or dirt has historical and ceremonial significance. In these cases, it’s not considered Pica unless the behavior is harmful or becomes compulsive.

4. Socioeconomic Stress

Lack of supervision, neglect, or food insecurity can also increase risk. In these environments, non-food substances may be the only things available to satisfy hunger or comfort.

5. Neurological Conditions

Brain injuries or developmental delays can alter impulse control or sensory perception, contributing to Pica behaviors.

Is Pica Dangerous? (Yes—Here’s Why)

1. Physical Risks

• Blockages: Hair, rubber, or stones can obstruct the digestive tract.
• Toxicity: Paint chips may contain lead. Soil can contain parasites or chemicals.
• Dental Damage: Hard substances can crack or wear down teeth.

2. Mental Health Impact

People with Pica often feel ashamed or confused about their cravings. The secrecy and isolation that follow can contribute to anxiety, depression, or even co-occurring eating disorders.

3. Risks in Children

In kids, Pica can cause developmental delays, weight issues, and repeated infections—especially if they’re consuming contaminated substances.

4. Pregnancy Complications

For pregnant women, eating non-food items can reduce nutrient absorption and harm the fetus due to exposure to toxins or heavy metals.

How Is Pica Diagnosed?

There’s no single test for Pica, but a thorough evaluation usually includes:

1. Medical Tests

• Bloodwork to check for iron, zinc, or other deficiencies.
• Imaging (like X-rays) if blockages or internal injuries are suspected.

2. Psychological Assessment

Mental health professionals assess behavior patterns, emotional stress, and history of trauma or obsessive tendencies.

3. Ruling Out Other Conditions

Doctors also consider conditions like trichotillomania (hair-pulling), autism-related behaviors, or OCD before making a diagnosis.

How Is Pica Treated? (Good News: It’s Treatable)

1. Nutritional Interventions

If Pica is linked to iron or zinc deficiency, supplements can reduce cravings significantly within weeks, according to studies from J Med Case Rep.

2. Behavioral Therapy

• CBT (Cognitive Behavioral Therapy): Helps identify triggers and build healthier coping mechanisms.
• Habit Reversal Training: Especially useful for kids or neurodiverse adults.
• ABA (Applied Behavior Analysis): Used in cases involving autism or developmental disabilities.

3. Medication

If Pica is tied to OCD or anxiety, selective serotonin reuptake inhibitors (SSRIs) may be prescribed to reduce compulsive behavior.

4. Family & Caregiver Support

Education, monitoring, and consistent routines are essential. Punishing the person rarely works—instead, empathy and structure make the biggest difference.

Living With Pica: What Day-to-Day Looks Like

Practical Tips for Managing Pica

• Keep harmful items out of reach.
• Use safe sensory alternatives (like chewable jewelry or ice).
• Track cravings and triggers in a journal.

Support Networks

Connecting with others—either in-person or online—can reduce shame and provide practical tools for caregivers and those with Pica.

When to Seek Help Again

Relapse can happen. Seek professional help if the behavior returns, becomes secretive again, or starts impacting health and relationships.

Children vs. Adults: How Pica Differs by Age

Frequently Asked Questions

Is Pica a sign of mental illness?

Not always. It can be linked to nutritional issues, developmental disorders, or mental health conditions—but not in every case.

Can Pica go away on its own?

Sometimes, especially in children. But many people need targeted treatment and support to fully recover.

How do I discuss this with my doctor?

Be open. Mention specific substances eaten, how often, and any health symptoms. Doctors are trained to approach this without judgment.

Is it dangerous during pregnancy?

Yes. Eating non-food items can reduce vital nutrients and harm both the mother and baby. It’s essential to discuss this with your OB-GYN. Many women also report digestive discomfort during pregnancy, which can sometimes make cravings worse.

If that’s your case, these natural remedies for acid reflux during pregnancy might help ease symptoms and support healthier eating patterns.

Conclusion: Let’s Talk About It

Pica is more than just an odd habit—it’s a serious condition that can affect someone’s health, safety, and emotional well-being. Learning what is Pica eating disorder and how it shows up in different people is the first step toward understanding and support.

If you or someone you love is showing signs of Pica, don’t brush it off. Early intervention matters. Sometimes, what seems like a strange craving is your body or mind asking for help in the only way it knows how.

Have you ever experienced or witnessed unusual food cravings like this? What questions would you ask if it happened to someone close to you?