If we suffer it s because of sin in our lives. If we would remove the sin, the suffering would vanish. The Bible teaches we are sinful people. It would be an impossible task for me to focus on one sin causing divine punishment when my self-analysis reveals a multitude of transgressions worthy of no less than eternal death. If we truly believed, God would heal all our maladies.
Faith can move mountains.
Again, we are attracted to the logic of such an answer, but it ignores some important biblical texts. In 2 Corinthians 12 the Apostle Paul described a painful affliction developed after receiving some glorious revelations from the Lord. He identified his pain as God-given. I can do all things through Christ which strengtheneth me. The answer to our question is not to be found in a lack of faith.