When a patient’s back flashes while lifting heavy objects, it can be diagnosed as an acute sprain of the muscular tissues of the lower back, which mainly manifests as pain and limited movement of the lower back. In this case, first of all, the patient should stop lifting heavy objects, should rest in bed, relax the muscle tissue of the lumbar region, which can reduce the bleeding phenomenon in the muscle and can relieve the pain. The lumbar area should also be externally applied with the effect of activating blood stasis, reducing swelling and relieving pain, such as golden ointment, blood circulation and pain relief ointment, and orthopedic wash fumigation can also be given. Oral medications for bruises and battering injuries can be taken orally, such as Shujinjin and blood circulation tablets, bruising pills, and Dahuoluo Dan to accelerate the recovery of damaged muscle tissues as soon as possible.