Why Does Sean Get Splinters in Servant?

After removing and destroying a creepy homemade straw cross that nanny Leanne Grayson placed over baby Jericho's crib, Sean began experiencing strange bodily responses. He loses his sense of taste and begins finding random, painful splinters all over his body.

Is Leanne a witch in Servant?

Rejecting the popular belief that she might be a witch or a psychopath, I instead posit that Leanne is actually a saint. That is, she is a divine being that had been born as a normal human before dying and ascending to heaven.

Why did Sean burn his hand in Servant?

He has lost all physical senses including taste and even touch. We do not know why that may be. Uncle George thinks that it is something caused by Leanne, but it might not necessarily be true. ... However, him trying to burn his hand to inspect his senses is proof that Sean might have tipped over the fence into trauma.