Young people with back flashes, if there is no other injury, in about a week or so can be basically recovered. Young people with back flash, if there is no other injury, in about a week can basically recover. If the symptoms are serious, you need to check to rule out lumbar disc problems. If the symptoms of soft tissue injury is more serious, you can bed rest, the use of pain relief cream (such as flurbiprofen ester gel paste, etc.). If the symptoms are not relieved or even worsened after 2-3 weeks of rest and other conservative treatments, it is important to go to the hospital for a thorough examination to avoid compromising the treatment. Most of the back flashed mainly soft tissue injury (ligament or muscle), this situation after about a week can be basically recovered, the specific recovery time, you can consult a professional physician advice.