Acute lumbar sprain, commonly known as flashback, is an acute sprain of the lumbar soft tissue, mostly seen in young adults. Mainly due to limb overload, incorrect posture, uncoordinated movements, sudden loss of footing, violent lifting, unprepared activities, excessive range of activities, etc. caused. Once the lumbar sprain occurs, the patient immediately lumbar stiffness, bending and rotation in a difficult situation, pain is intense and widespread, muscle spasm, coughing or sneezing will increase the pain, it is difficult to walk, some patients still need family support, or carry to the nearby hospital emergency room. The disease is one of the most effective acupuncture treatment, often a needle effect, and can even make the patient “carry in, walk out”, this magical treatment is called a needle therapy. One-needle therapy is a single-acupuncture point therapy in acupuncture, referring to the use of one point and one needle to treat diseases, which is the magic and subtlety of acupuncture. But the clinical selection of acupuncture points is not always selected only a single point, such as the clinical discovery of lumbar sprain injury in the foot sun meridian to “Houxi” the best effect; injury in the Governor’s vein, “Shuigou” effect is obvious; injury in the foot sun and foot Shaoyang, take the lumbar pain point is the most ideal. One-needle therapy is also not only used for acute lumbar sprains, but also very effective for falling pillow, frozen shoulder, and acute ankle sprains, etc. Often, one needle works to relieve the patient’s pain.