Sacroiliac joint pain on one side does not usually lead to thickening of the leg on the same side. Sacroiliac joint is formed by the spinal sacral bone and pelvic ilium joint, sacroiliac arthritis will cause pain, stooping activities are limited, etc. This disease is a localized lesion, sacroiliac arthritis serious will cause sacroiliac joint hyperplasia, but there is no obvious effect on the leg, generally will not cause the same side of the leg thickening. After the appearance of sacroiliac arthritis should pay attention to appropriate rest, avoid weight bearing, can be treated by hot compresses, baking, massage and other physiotherapy. Drugs can be oral anti-inflammatory analgesic drugs, such as diclofenac sodium, meloxicam and so on. If the symptoms of unilateral sacroiliac arthritis, it is recommended that the patient go to the hospital to improve the examination, to clarify the cause of the disease, and receive regular treatment.