Participants in this group will be received orofacial manual therapy as treatment. The number of participants is planned to be 23.

As orofacial manual therapy, soft tissue (intraoral and extraoral trigger point therapy and myofascial release of painful muscles) and joint mobilization (caudal and ventro-caudal traction, ventral and mediolateral translation), muscle energy technique, fascia mandibularis release, occipital release and ligamentous treatment was planned.

The algometer is a reliable instrument for measuring the sensitivity of the masticatory muscles and 1 cm below the Posterior Superior Iliac Spine (PSIS). The measurement will be made at 10 points. A force (Newton in force) of 1 kg (weight in kilogram) per square centimeter (surface area in centimeter square) is applied to the patient for 3 seconds, and this is continued until the patient feels pain (weight and surface area will be combined to report Newton in kg/ cm2). This process will be repeated three times and the average value will be calculated.

Mouth opening, protrusion and right and left lateral deviation will be measured starting from 0 using a 15 cm ruler. Repeated measuring reduces the standard error of measurement, hence repeated measurements will be also included in our study (three times) with the largest recorded range taken.

The patient lies in a supine position. Direct posterolateral pressure is applied to the bilateral anterior superior iliac spines, thus stressing the anterior sacroiliac ligament. Pathology in the Sacroiliac (SI) joint is considered if pain occurs in the hip.

The patient lies on his side with the affected side on top, with the hip at 45° flexion and the knees at 90° flexion. The physician stands behind the patient and applies pressure to the pelvis over the iliac crest directly toward the contralateral iliac crest. This test can be applied in a supine or prone position. Pathology in the SI joint is considered if pain occurs in the hip.

Oswestry Disability Index (ODI) will be used to evaluate low back pain. ODI consists of 10 items on the degree of severity to which low back trouble has affected the ability to manage in everyday life. The 10 sections cover the pain and the daily function (including pain intensity, personal hygiene, lifting, walking, sitting, standing, sleeping, sexual activity, social activity, and traveling). Each item is rated on a 6-point scale (0-5); the higher score means the higher level of disability related to low back pain.