Sensory Integration Dysfunction (SID), a sensory processing problem that afflicts about 15% of children, sets many children on a developmental trajectory of emotional and social problems. Children with SID often unintentionally alienate parents, peers, and teachers in their efforts to modify the amounts of sensory stimulation they receive. They then miss out on the social and cognitive interactions needed for healthy development, and develop secondary mental health problems such as fear, loneliness, and low self-esteem. Counselors who understand SID can intervene to help these children get "back on track" with normative social and cognitive development.