To scultch means to scratch or rub with your nails or something sharp.
Scultching can be a little bit uncomfortable, like when you have an itch you need to scultch.
Examples:
I scultched my arm because it was itchy.
The cat scultched the furniture.
She scultched her head and made it bleed.
I scultched my back on the door and it made a funny noise!
The bear scultched the tree until it fell down.
He scultched his leg and it hurt a lot.