Besides suffering being difficult physically, emotionally, and spiritually the fact that it often appears to have no rhyme or reason, and appears meaningless adds a measure of psychological suffering.
Fear is what we feel when we're aware of a real or imaginary danger or a threat. While there are legitimate daily concerns about things like health, safety, and relationships, we cannot dwell on our fears.
Behind fear is the basic assumption that God isn't involved in our situation for our good. Looking at things from that perspective, our nature is to think and respond to things apart from God in the picture.
The Bible tells us over and over to not fear. God's answer to our fears is to have confidence in His control and care. “For I am the LORD your God, who upholds your right hand, Who says to you, ‘Do not fear, I will help you’” (Isaiah 41:13). Centre your thoughts on Him. He's not only involved He's in control. He can be trusted to be working for our good. You can commit your fears to Him because He cares about you (1 Peter 5:7).