A bulging disc is a spine, usually the lumbar or lower back that occurs when a disc bulges through a crack in spine-related conditions. Disk soft, thin material that cushions the spinal vertebrae are. A bulging disc occurs when the disk shifts out of its normal radius and most often simply as a result of age.A bulging disk is different from a herniated disk, bulging disk that usually sudden but time with gradually occurs. A herniated disc or spinal cord injury often results from trauma. In the majority of patients who experienced a bulging disk, there is no pain until the disc becomes herniated or in a nerve protrudes. In many cases, a bulging disk condition as secondary to another problem can be diagnosed. Because a bulging disk is not always cause pain, it's only magnetic resonance imaging (MRI) as a routine or diagnostic imaging tests can be found during. Typically, a bulging disc is a problem until it begins to cause pain is herniated, or gets ruptures.