Elaine Aron, PhD notes high sensitivity means “you are aware of subtleties in your surroundings” and also that you are “more easily overwhelmed when you have been out in a highly stimulating environment for too long.” In addition to other sources of sensation and input, a highly stimulating environment may be one or more other [...]
Shyness and introversion may seem to be the same in some ways, at least on the surface.
They can overlap, and we may have both traits – but they are not the same thing. And they are not the same as the trait of high sensitivity.
Follow the link to my post with more, including a video.
- just highlight text 
is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.