Calf swelling after lumbar sprain is considered to cause lumbar disc herniation, it is recommended to perform imaging tests to further clarify, and give general treatment, physical therapy, drug therapy and so on. Lumbar sprain can cause lumbar muscle and ligament injury, rupture of the intervertebral disc fibrous ring, nucleus pulposus protrusion, compression of local nerve roots, resulting in calf swelling. At this time, magnetic resonance examination of the lumbar spine should be carried out to clarify the severity of the herniated disc, combined with the patient’s symptoms for treatment. If simple calf swelling, accompanied by lumbar pain, no lower limb cramps, lumbar sprain early recommended within 72 hours of bed rest, lumbar local cold compresses, after 72 hours can be hot compresses, physiotherapy, do not massage, oral pain medication (diclofenac sodium extended-release tablets), swelling medication (Panlong seven tablets), nutritive nerve medication (methylcobalamin tablets). Calf swelling after lumbar sprain is recommended to actively consult the doctor, under the guidance of the physician treatment. Medications should be taken in accordance with medical advice.