Patient: Description (onset time, main symptoms, hospital visited, etc.): Female patient, 25 years old, used to be in relatively good health, due to a fall in the snow accidentally in February 2011, both hips landed on the ground, and felt pain on both sides of the hip at that time, outside the Chinese herbal acupuncture physiotherapy, some improvement, but due to weather changes pain recurring; sedentary hip has a pressure point swelling pain. I felt a nerve pain in the femur. The pain is easily caused by numbness and weakness in the back and outside of the calves. At present, the local MRI doctor diagnosed: sacral canal cyst, size about 2cm, lumbar spine is okay. The MRI shows that the lumbar spine has a bulging disc at 4-5. The MR shows that the lumbar spine 4-5 disc bulge. I would like expert guidance on which treatment is needed for the above clinical symptoms and the 2cm size cyst, and whether surgery is needed, and which one should be treated first if both conditions appear at the same time, please expert judgment. Doctor: Sacral cyst is a benign disease, the main symptoms are pain, swelling and numbness in the lower back and legs, which may affect lower limb activities. According to different symptom manifestations, corresponding treatment methods are adopted, including surgery if necessary. Drug treatment or performing sacral canal closure treatment can generally achieve better results.