Suffering cannot be caused by anything that you can perceive with your physical senses.
All Cause exists only outside of time and space.
The cause of all suffering is the Ego-mind,
which exists outside of time and space,
and believes it is separate from God.
You created the Ego-mind
To experience the illusion of separation from God.
Of course, the Ego-mind cannot be separate from God,
Because You are not.