A S. is simply a parasite, there to irk you with headaches, unhappiness and a lack of motivation. It drains warmth, positive thoughts and sometimes every flow of ideas out of your head. They disguise as puss filled bruises and hurt a lot. They also hunt animals.
How to fight it
Several ways: Shower really, really cold. They hate that. If you try to pull one from your head, be extra carefull to catch all the legs and the head. A S. can live without its body and will go inside your skull, if threatened too much on the outside. gab