The evil spirit you speak of is the conjoined energies of all the life you have ended in this plane. Bugs, mostly.
Go out and spray your whole body with Raid, making sure you get quite a lot in the eyes. This will help "envision" the pulsations.
Then find three black widows, and place them in a triangle pointing toward your heart on your forehead.
You should be ok youngling.
Abudu de hache.