Patients in the manual therapy group will receive 5 sessions of sacroiliac joint manipulation once a week. And home exercises will be given and told. Each patient will do exercise 4 days a week for 4 weeks.

To patients in the injection group corticosteroid (1 ml 40 mg methylprednisolone) and local anesthetic (1 ml 1% lidocaine)will be injected into the sacroiliac joint using a 22 G spinal needle, guided by fluoroscopy (C-arm fluoroscopy).

And home exercises will be given and told. Each patient will do exercise 4 days a week for 4 weeks.

Some sacroiliac manipulation and mobilization techniques will be applied to patients by an experienced physiatrist. Patients in the manual therapy group will receive 5 sessions of sacroiliac joint manipulation once a week.

NRS is an 11-grade scale that evaluates the severity of pain in adults .NRS is one of the most commonly used scales in the assessment of pain severity. Possible scores ranges from 0( no pain) to 10 ( worst pain)

The Oswestry disability index will be used to evaluate how much the patients' low back pain limits their activities in daily life. This index was first created in 1980 . The questionnaire consists of 10 sections, each assessing limitations in different daily activities and functions. Each section is scored from 0 to 5. A score of 0 indicates that there is no restriction while doing that activity, while a score of 5 represents the highest level of restriction in that activity. The maximum score is 50. As the total score increases, the disability level of the individual increases. In 2004, Turkish validity study was carried out by Yakut et al.