Rett Syndrome and Aggression in Girls: Understanding Behaviors and Triggers

Aggressive behaviors (hitting, biting, hair-pulling, self-injury) occur in a subset of girls with Rett syndrome (RTT), a neurodevelopmental disorder caused by MECP2 mutations. These are not willful acts but expressions of unmet needs.

Primary Drivers

• Communication Impairment: Loss of speech and purposeful hand use → inability to express pain, discomfort, wants, or emotions. Frustration → aggression.
• Pain and Medical Comorbidities: GI issues (constipation, reflux), scoliosis, osteopenia, dental problems, menstrual pain, epilepsy. Often unrecognized due to communication deficits.
• Sensory Processing Differences: Over/under-responsiveness to stimuli → meltdowns.
• Anxiety and Hyperarousal: Common in RTT; unpredictable environment exacerbates.
• Medication Side Effects: Stimulants, antipsychotics, antiepileptics can cause irritability, agitation, or disinhibition.
• Sleep Disturbances: Fragmented sleep worsens daytime regulation.

Assessment Approach

1. Rule out pain first: Comprehensive physical, dental, GI, musculoskeletal exam.
2. Functional Behavior Assessment (FBA): Identify antecedents, behaviors, consequences (ABC).
3. Communication evaluation: AAC (augmentative and alternative communication) trial — eye gaze, switches, picture exchange.
4. Medication review: Taper offending agents; consider targeted pharmacotherapy (e.g., low-dose risperidone for severe aggression, melatonin for sleep).

Supportive Strategies

• Predictable routines, visual schedules.
• Sensory diet (OT-guided).
• Pain prophylaxis (regular bowel regimen, dental care).
• Caregiver training in de-escalation and positive behavior support.
• Respite care for family sustainability.

Aggression in RTT is a communication of distress. Addressing root causes improves quality of life for the girl and her family.