Jesus, a God, is born of the virgin Mary by the power of the Holy Spirit. He therfore, really became one of us. He became a man. He worked as a carpenter. He experience to live as a real human, not to live as a God, because is very humble. These things are one of the proofs of His humility.

So, as part of being a human, He needed to suffer emotional and physical pain as a  penalty for our sins.

Although spiritual separation from God is the heaviest sacrifice of Jesus, physical and emotional pain are really part of the entire salvation made by Jesus Christ.