Sacroiliitis is a condition in which the sacroiliac joints, the joints that connect the pelvis and lower spine, develop inflammation, according to Mayo Clinic. It can cause pain in the buttocks, in the lower back and down the legs.
The pain associated with sacroiliitis usually begins or gets worse when patients climb stairs or stand for prolonged time periods, Mayo Clinic reports. Running, taking long strides while walking, and putting more weight on one leg can also aggravate symptoms.
Sometimes, sacroiliitis is misdiagnosed as another condition affecting the lower back, Mayo Clinic states. It's important to get the correct diagnosis and treatment because sacroiliitis has been connected to several conditions that lead to inflammatory arthritis.
Several conditions can lead to sacroiliitis, according to MidOhio PainCare. Most cases are caused by degenerative arthritis or osteoarthritis. As people age, the bones thicken or develop spurs, which can irritate the surrounding tissue and cause inflammation. Sometimes, sacroiliitis is caused by trauma or overuse. A variety of other health conditions, such as Crohn's disease, psoriasis and ulcerative colitis, are also linked to sacroiliitis.
Most cases of sacroiliitis are treated with anti-inflammatory pain medications, MidOhio PainCare reports. Additional pain relievers may be prescribed to address severe pain. Doctors also prescribe physical therapy to strengthen muscles and improve endurance, which helps to stabilize the spine.