Define the behavior first

1. Mouthing or chewing without swallowing: may be sensory-regulatory, habitual, anxiety-related, communicative, or automatically reinforced.
2. Pica: persistent ingestion of nonfood, nonnutritive substances, clinically significant and developmentally inappropriate. In children younger than 2 years, mouthing is often developmentally expected.
3. Feeding or oral-motor difficulty: food selectivity, chewing, swallowing, or pain-related behavior, which needs a different assessment.

Suggested recent and high-yield articles

Evidence-informed protocol for oral seeking in autism

1. Immediate safety screen

• Chewing/mouthing only, or actual swallowing
• Directed toward high-risk items: batteries, magnets, sharp items, coins, plastic, fabric, soil, paint chips, feces, medication, chemicals
• Causing bleeding, dental injury, skin breakdown, infection, choking, vomiting, abdominal pain, constipation, diarrhea, or reduced appetite

2. Clinical and developmental assessment

• Onset, frequency, duration, setting, items targeted, whether objects are swallowed
• Developmental level, communication needs, intellectual disability, anxiety, sleep disruption, pain behavior, and environmental changes
• Dental pain, mouth ulcers, reflux symptoms, constipation, abdominal pain, nausea, hunger, and medication changes
• Diet and growth, especially severe food selectivity
• Exposure history for lead or other toxins
• Need for targeted tests such as CBC/ferritin and lead testing based on ingestion/exposure risk and dietary history. Avoid indiscriminate lab panels.

3. Establish baseline and functional hypothesis

• Automatic sensory reinforcement
• Escape from demands
• Access to preferred items/activities
• Attention or communication of discomfort/need

4. First-line intervention package

A. Reduce opportunity and injury risk

• Remove or secure dangerous target items in the environments where behavior occurs.
• Increase supervision during high-risk periods identified from baseline data.
• Use safe storage, visual boundaries, and predictable routines.
• Where appropriate, offer a clinician-approved, age-appropriate oral alternative for chewing, with hygiene and supervision. This is a risk-reduction measure, not a proven stand-alone treatment for pica.
• Do not rely on oral tools if the child bites off pieces or swallows them.

B. Teach a competing communication response

• “Chew please”
• “Break”
• “Help”
• “Pain”
• “Snack”
• Picture/AAC card, gesture, switch, or sign

C. Differential reinforcement and discrimination training

• Reinforce safe hands, safe mouth, discarding items, using the communication response, and engaging with a safe alternative.
• Teach discrimination explicitly: “food/safe chew item” versus “not for mouth.”
• Start with frequent, immediate reinforcement and fade gradually only after stable improvement.
• Match reinforcers to the individual child and reassess preference frequently.

D. Function-matched changes

5. What not to use as the core plan

• Response blocking alone: insufficient evidence of effectiveness for pica in the systematic review.
• Punitive, aversive, or restrictive approaches: should not be routine. They require clear clinical justification, safeguards, consent, trained implementation, and monitoring. Restrictive practices may be needed temporarily for immediate safety, but not as a substitute for assessment and skill-building.
• Sensory integration alone: do not promise it will reduce dangerous oral behavior. The SenITA RCT found no broad advantage over usual care, though individualized goal-focused occupational therapy may still have a role.

6. Monitor outcome weekly

• Episodes of mouthing/chewing and ingestion per day or per hour
• Number and type of dangerous-item contacts
• Injuries, dental concerns, choking, GI symptoms
• Use of replacement communication
• Engagement in safe alternative activities
• Caregiver burden and feasibility

7. Documentation template