A literature review discusses published information in a particular subject area, and sometimes information in a particular subject area within a certain time period.
Herniated discs often do not need to heal at all. That is because most minor and moderate herniated discs are not painful or problematic in any way. They merely exist. In fact, herniated discs are a common side effect of normal spinal aging.
Disc degeneration or slippage (herniation) can heal and stop hurting- if you let it - no differently than a sprained ankle. Stop damaging your discs with bad bending, standing, and sitting habits and your discs can heal. It takes years to herniate a disc, and only days to weeks to let it heal it by stopping bad habits.