Flash back hurts when you move, it is recommended to reduce activities, pay more attention to rest, can be treated by drugs, acupuncture physiotherapy, massage and other ways. 1. Drugs: flashing back pain when moving, usually belong to the acute pain, easy to affect walking and lower limb movement. You can take some medicines to activate blood circulation and remove blood stasis, such as healing spirit tablets, panax notoginseng tablets, panlong seven tablets, bone Kang capsule and so on, to alleviate the pain symptoms. 2. Acupuncture and physiotherapy: patients with severe sprains need to rest in bed and minimize activities. Acupuncture and physiotherapy can be used to improve the stiffness of the lower back and relieve pain. 3. Massage: If it is not a fracture, you can use massage to temporarily relieve the pain in the lower back, massage can also be assisted by using some drugs to activate blood circulation and remove blood stasis, such as diclofenac sodium ointment or safflower oil, bone water, etc.. It is recommended to go to the hospital in time, under the guidance of the doctor for treatment. The above drugs should be used under the guidance of a doctor, avoid self-medication.