Sensory processing disorder—also known as SPD or sensory integration disorder—is a term describing a collection of challenges that occur when the senses fail to respond properly to the outside world.

Sensory overload is the overstimulation of one or more of the body’s five senses. People will respond differently to feeling overstimulated, but symptoms often include anxiety, discomfort, and fear.

Both autism spectrum disorder (ASD) and attention-deficit-hyperactivity disorder (ADHD) are neuropsychiatric conditions involving differences in brain structure and chemistry. There are some ...