God Almighty, Who is Love, never designed us to have pain, emotional or physical. Just look in the first chapters of Genesis, when God created man, the Bible says, that everything God created was very good.
The primary desire of God for us, who are created in his image, is to be without any pain, in body, soul or spirit. That is why Jesus healed so many times as recorded in the New Testament. That is why the Bible calls God, the God of all comfort. Look at 2 Corinthians 1:1-11.
God has promised us in the Bible to heal us in our body, soul and spirit, and to comfort us, because he cares for us. In the book of Revelation, it is written that God will wipe away every tear from our eyes, and that there will be no more pain one day. That is the desire of God for each of us.
Pain, suffering, and many other bad things happen, because many people have chosen to go away from God, and do their own things, and to sin. That is what many choose to do. In fact, most of the problems in this world, come from people, and not from God, because people choose to do the various things, which are negative.
Romans 15:13, Psalm 121:7, Psalm 46:1, Psalm 62, Psalm 68:19, Psalm 147:3, 2 Corinthians 1:3-11, 4:16-18, 7:6, 12:8,9,10, Psalm 43:5, Psalm 22:24, Psalm 119:50, Psalm 34, Psalm 42:5, Psalm 86, Nahum 1:7, Job 29:3, Isaiah 25:8, 30:18,19,20, 40:1, 41:10,13,14, Psalm 69, Psalm 13, Psalm 94:19, Lamentations 3:1-66