sp is a anxiety disorder triggered of by nervousness in social situations, like its more of a physical version of shyness i guess. blushing, sweating palms or anxiety attacks or panic attacks. i dont even no why theres a word for shyness tbh lol everyones different no what i mean. theres nothing wrong with u if ur shy, where as if u have sp its not normal.
further down the chain theres avoident personality disorder which is even worse than SP!