Ok so this is a tutorial on how to make yourself look gorgeous!! First get the picture you want to use (preferably one of a person)!!
Then select the polygonal lasso tool.
oops.. deleted the picture but basically you would select the portion of the picture you want to work with. Then, right click and choose select inverse. Then hit delete and you get the picture below.
Then, go to filter -> liquify
then click the pucker tool below.
You can use this tool to make things thinner, for example, I made my cheeks and neck thinner. proceed to click ok
Then go to the healing brush where you can get rid of blemishes, bumps, pimples, and even eyes! All you do is select it and then paint over the areas you want to change.( make sure to select content aware at the top)
Now select the sponge tool, This tool turns areas more grayscale as seen below that I did with my face.
Now select the burn tool which darkens areas based on skin or color tone.
I did this with my eyes so it looks a little bloody underneath and my eye holes are gone.
Now go online and find a rotten flesh-like image.( I used google images.)
Now copy the image and paste in photoshop, then, size to your liking.
then change opacity and erase areas you don't want.(use soft bruise.) Then use the burn tool and go around the border of the flesh to make it look like a wound.
Now select liquefy again.(the second liquefy option under filter. not the first!!)Then select the forward warp tool and make your hair look spiky and crazy.
And your done.Fabulous!!!!!