Doctronic

Understanding Pica: Causes, Diagnosis, Treatment, and Prevention

Alan Lucks | MD

Medically reviewed by Alan Lucks | MD, Alan Lucks MDPC Private Practice - New York on May 14th, 2023.

Key Takeaways

  • This eating disorder requires persistent consumption of non-food substances for at least 1 month, most commonly affecting children ages 18-24 months and individuals with developmental disabilities.

  • Commonly consumed items include starch, ice, dirt, paint chips, and paper, which can cause lead poisoning, intestinal blockages, parasitic infections, and severe nutritional deficiencies like iron-deficiency anemia.

  • The condition occurs in up to 25% of individuals with intellectual disabilities and is strongly associated with autism spectrum disorders, with sensory-seeking behaviors often driving the compulsions.

  • Behavioral interventions focus on positive reinforcement and environmental modifications, while medical treatment addresses underlying deficiencies—iron supplementation often reduces ice craving (pagophagia) within weeks.

  • Environmental safety measures include removing accessible non-food items, installing safety locks, and providing appropriate sensory alternatives like textured toys for those seeking oral stimulation.

Pica is an eating disorder characterized by the persistent consumption of non-food substances that have no nutritional value, such as dirt, paint, or paper. While the exact causes of pica are not fully understood, it is more common among individuals with intellectual disabilities, developmental disabilities, or obsessive-compulsive disorder.

Prevalence of Pica

According to the Handbook of Clinical Child Psychology, the prevalence of pica ranges from 4% to 26% among institutionalized populations. However, estimating the prevalence in non-institutionalized populations is more challenging due to the lack of comprehensive studies.

Diagnosing Pica

If pica is suspected, a thorough medical evaluation is crucial to assess for potential complications such as anemia, intestinal blockages, or toxicity from ingested substances. The diagnostic process typically involves:

  • A complete medical history and physical examination

  • X-rays and blood tests to check for anemia, toxins, and blockages in the digestive tract

  • Tests for infections caused by consuming contaminated items

  • A review of the individual's eating habits

  • Evaluation for the presence of other disorders that may contribute to the unusual eating behavior

To receive a diagnosis of pica, the pattern of eating non-food substances must persist for at least one month.

Understanding Pica: Causes, Diagnosis, Treatment, and Prevention

Treatment Options for Pica

Given the potential medical complications associated with pica, close medical monitoring is essential throughout treatment. Collaboration with a skilled mental health team is also ideal for optimal management of these complex cases. The most effective treatment approach for pica, as supported by the Handbook for Clinical Child Psychology, involves general behavioral strategies, such as:

  • Training to distinguish between edible and non-edible items

  • Positive reinforcement to encourage the consumption of appropriate foods

Potential Complications of Pica

Pica can lead to various complications, including:

  • Poisoning from consuming toxic substances like lead, increasing the risk of learning disabilities and brain damage

  • Nutritional deficiencies due to interference with eating healthy food

  • Constipation or blockages in the digestive tract from ingesting indigestible objects

  • Tears in the lining of the esophagus or intestines caused by hard or sharp objects

  • Infections from bacteria or parasites present in dirt or other consumed items

Co-existing developmental disabilities can also make treatment more challenging.

Outlook and Prevention

Pica typically begins in childhood and often lasts for just a few months. However, managing the disorder may be more difficult in children with developmental disabilities. While there is no specific way to prevent pica, close attention to eating habits and supervision of children known to put non-food items in their mouths can help identify the disorder before complications arise.

For more information on pica and other eating disorders, visit:

The Bottom Line

Early intervention combining behavioral therapy with medical monitoring is essential to prevent potentially fatal complications like lead poisoning or intestinal perforation. Treatment success depends heavily on identifying and addressing underlying nutritional deficiencies or developmental conditions driving the behavior. If you notice persistent non-food consumption in yourself or a family member, Doctronic can help connect you with appropriate specialists for evaluation.

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