First we must understand that GOD did not desire that we suffer. Suffering came into being because man chose to sin. There was no suffering in the Garden of Eden until man sinned, and Adam and Eve were driven out of Eden. Man brought suffering into the world by sinning. Much suffering continues in the world caused by men who sin.
Sin has long-lasting concequences.
GOD cares very much for us and does not want anyone to suffer. Man's disobedience caused the loss of GOD's blessings. Our bodies are no longer immortal as Adam and Eve were in the garden before they sinned . Therefore we suffer from disease, sickness and physical death. All are the result of sin.