Highly Sensitive People are easily overwhelmed by sensory input (think the 5 senses--taste, touch, smell, hearing and sight). Bright lights and bright sunshine can feel like too much, strong smells, loud noises or unappealing noises can feel assaulting to our finely-tuned nervous systems. The texture of clothes can strongly impact us (tags, itchy fabric, restrictive clothing, tight belts or waistbands). We may have a favorite blanket or pillow because it is soft and comforting. It might be difficult to tune out noises in the environment that others don't even hear or notice.
Unapologetically Sensitive