After the flash back absolutely bedridden for 2-3 days, at the same time give non-steroidal anti-inflammatory pain medication or blood circulation and blood stasis medication, symptomatic pain treatment, give local physical therapy, hot compresses, so that the better faster. Flash back is mostly due to incorrect posture for work, or daily labor in some cases of lumbar back sprain, resulting in lumbar back pain, lumbar back activity is limited. If it is not serious, there is usually no nerve compression, and there is no clinical manifestation of numbness and pain in the lower limbs. The standard clinical terminology for back flashes is acute lumbar sprain, which is mainly due to trauma resulting in misalignment of the small joints or aseptic inflammation of the small joints resulting in pain. Therefore, if there is no relief within a short period of time, you must go to the regular hospital in time to further improve the relevant examination and choose further reasonable treatment methods after clarifying the cause.