Along with growing age, our body can go through wear and tear that occur in the disc. This may lead to the soft spongy tissue in the center of the disc squeezing, i.e., herniate on the side of the disc. Thoracic disc herniation may also occur due to a type of injury such as a sudden and forceful twist of the mid-back during an accident or a fall, or Scheuermann’s disease – a disease of the thoracic spine.