Left sacroiliac joint and right neck pain is not caused by the same disease, it may be caused by sacroiliac arthritis, cervical spondylosis and other different diseases. 1. Left sacroiliac joint pain may be caused by sacroiliac arthritis, due to age-related degenerative diseases, pathogenic microbial infections, acetabular dysplasia and other factors can lead to aseptic inflammation of the sacroiliac joints, resulting in hyperplasia, oozing and other inflammatory changes, which can cause the left side of the sacroiliac joints of the body to experience pain symptoms. 2. The right neck pain may be caused by cervical spondylosis. Long-term bad posture or working with head down will lead to degenerative changes in the structure of cervical vertebrae, which will squeeze and stimulate the surrounding nerves and blood vessels, and cause neck pain and other uncomfortable symptoms. Therefore, when the symptoms of left sacroiliac joint pain and right neck pain occur, it is recommended to go to the orthopedic department of the hospital in time to find out the specific cause of the disease.