They crave dirt, eat ice by the trayful, chew on paper, or swallow other things that simply aren’t food. It’s not a one-time curiosity—it’s a persistent pattern that baffles others and often shames the person experiencing it.
This is pica—a condition that’s more common than most people realize and can have serious health consequences.
What Is Pica?
The Simple Explanation
Pica is an eating disorder characterized by the persistent eating of non-nutritive, non-food substances for at least one month. The behavior is inappropriate for the person’s developmental level and is not part of a cultural or social practice. Common substances include dirt, clay, ice, paper, hair, soap, chalk, or starch.
Think of it like this: Most people have no desire to eat things that aren’t food. But in pica, the brain signals cravings for substances that provide no nutrition—sometimes intensely. It can be linked to nutritional deficiencies, developmental differences, mental health conditions, or other factors. Whatever the cause, the craving feels real and compelling.
What Gets Eaten
Common substances:
– Ice (pagophagia—one of the most common)
– Dirt or clay (geophagia)
– Paper or cardboard
– Hair (trichophagia)
– Starch (amylophagia)
– Chalk
– Soap
– Paint chips
– Metal objects
When It’s Not Pica
Not considered pica:
– Age-appropriate mouthing in infants/toddlers
– Culturally sanctioned practices
– Occasional, non-persistent behavior
Who Gets Pica?
Populations Affected
More common in:
– Children (often starts in childhood)
– Pregnant women
– People with intellectual disabilities
– People with autism spectrum disorder
– People with certain nutritional deficiencies
– People with certain mental health conditions
Age Patterns
How it presents:
– Can begin in childhood
– May persist into adulthood
– Sometimes appears during pregnancy
– Can start at any age
Why Does Pica Happen?
Nutritional Deficiencies
The link:
– Iron deficiency is strongly associated
– Zinc deficiency may contribute
– Pica sometimes resolves when deficiency corrected
– May be the body’s attempt to get missing nutrients
Developmental Factors
In intellectual disability and autism:
– More common in these populations
– May be related to sensory needs
– Environmental factors
– Limited understanding of appropriate eating
Mental Health Conditions
Associated conditions:
– Obsessive-compulsive disorder
– Schizophrenia
– Eating disorders
– Anxiety
Pregnancy
Common during pregnancy:
– Often related to iron deficiency
– May be culturally influenced
– Usually resolves after pregnancy
– Still needs medical attention
Sensory Factors
May seek:
– Specific textures
– Temperatures (ice)
– Tastes
– Oral stimulation
The Dangers
Health Complications
Pica can cause:
– Poisoning (lead, toxins)
– Intestinal blockage
– Intestinal perforation
– Parasitic infections
– Dental damage
– Nutritional problems
– Surgical emergencies
Specific Risks
Depend on substance:
– Dirt: parasites, lead poisoning
– Paint: lead poisoning
– Hair: intestinal bezoars (hairballs)
– Metal: perforation, obstruction
– Ice: dental damage
Why Medical Attention Matters
Evaluation needed:
– Check for nutritional deficiencies
– Assess for complications
– Identify contributing factors
– Develop treatment plan
Diagnosis
How It’s Identified
The criteria:
– Eating non-food substances
– For at least one month
– Inappropriate for developmental level
– Not culturally sanctioned
– Severe enough to need clinical attention
Medical Evaluation
Assessment includes:
– Detailed history
– Nutritional assessment
– Blood tests (iron, zinc)
– Assessment for complications
– Evaluation for related conditions
Treatment
Addressing Deficiencies
When nutritional:
– Iron supplementation
– Zinc supplementation
– May resolve pica in many cases
– Monitor for resolution
Behavioral Approaches
Therapy may include:
– Behavioral modification
– Identifying triggers
– Replacing behavior
– Environmental modifications
– Reinforcement strategies
For Associated Conditions
Treating underlying issues:
– Mental health treatment if indicated
– Developmental support
– Addressing sensory needs
– Treating OCD if present
Environmental Safety
Reducing risk:
– Limiting access to dangerous substances
– Supervision when needed
– Childproofing environments
– Removing hazardous items
For Caregivers
What to Do
If you notice pica:
– Don’t shame the person
– Seek medical evaluation
– Ensure environmental safety
– Be patient with treatment
Understanding It
What helps:
– This is a medical/psychological condition
– They’re not doing it for attention
– Punishment doesn’t work
– Addressing underlying causes helps
Overcoming Shame
For Those Affected
Know that:
– This is a recognized condition
– You’re not “weird” or “gross”
– Treatment is available
– Many people experience this
– Help is possible
Speaking Up
When seeking help:
– Be honest with doctors
– They’ve seen this before
– No need for shame
– Accurate information helps treatment
Moving Forward
Pica is a puzzling condition that often goes unreported due to shame or embarrassment. But it’s a recognized medical and psychological condition with real causes—nutritional, developmental, sensory, or psychological. And importantly, it often has real solutions.
If you or someone you care about is eating non-food items, please seek medical attention. Checking for nutritional deficiencies, assessing for complications, and developing a treatment plan can make a significant difference. Left untreated, pica can lead to serious health problems. With proper care, many people see significant improvement.
The craving may be strange, but the person experiencing it deserves understanding and help, not judgment.
This article is for educational purposes only and is not a substitute for professional evaluation or treatment. If you or someone you know is experiencing pica, please consult a healthcare provider. Arise Counseling Services offers compassionate support for individuals and families throughout Pennsylvania.
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