Soreness after minimally invasive surgery mostly refers to lumbar back pain after minimally invasive lumbar spine surgery, and the possible causes include normal phenomenon after surgery, excessive activity and anesthesia reaction. 1. Normal phenomenon after surgery: Although minimally invasive surgery causes less damage, it still causes soft tissue damage such as muscles and ligaments around the lumbar spine, and the damage has not yet fully recovered within a certain period of time after the surgery, so there can be a feeling of soreness in the lower back, which is a normal phenomenon, and after the damage is gradually recovered, the feeling of soreness can slowly disappear. 2. Excessive activity: If you don’t pay attention to rest after minimally invasive lumbar spine surgery, excessive activity can aggravate the injury of the surgical site or the accumulation of lactic acid in the muscles of the lumbar back, which can cause soreness and pain, which can be relieved after appropriate rest. 3. Anesthesia reaction: minimally invasive surgery requires lumbar puncture, such as epidural anesthesia or lumbar anesthesia, etc., which results in lumbar ligament injury and lumbar pain symptoms for a period of time after surgery. Usually after a month or so can be recovered and relieved. The causes of lumbar soreness after lumbar spine minimally invasive surgery are more, if the symptoms continue to be unrelieved, it is recommended to consult a doctor in time to clarify the cause of the disease and carry out targeted treatment.