Sensory Processing Disorder (SPD) is a condition where individuals have difficulty processing sensory information like touch, sound, and movement. It affects around 1 in 20 children. People with SPD may feel overwhelmed by sensory input or seek intense sensations. They have trouble with motor skills, social skills, and school performance. Occupational therapy helps teach skills to manage sensory input but the causes and best treatments are still being researched. SPD is being considered for inclusion in the DSM-V diagnostic manual.