In addition to conventional treatment program the placebo local vibration application will be applied bilaterally to the cervicothoracic region of the patients in the placebo group. For the application, the patient will be placed in an upright sitting position, and the local vibration device will be moved without touching the patient's skin while it is operational.

In addition to conventional treatment program the patients in this group will receive bilateral local vibration application on the cervicothoracic region, utilizing two different frequency values, 50 Hz and 100 Hz. Initially, a flat attachment will be placed on the device, and application will be performed on the neck and back regions for 5 minutes at a frequency of 50 Hz. Then, the other attachment of the device will be used, the frequency value will be increased to 100 Hz, and application will be performed on a total of 5 sensitive points specified by the manufacturer in the neck and back regions, with one minute per point for a total of 5 minutes. Local vibration will be applied to each side for ten minutes, totaling 20 minutes, and this will be conducted for five consecutive days. To determine which side to start the application from, a coin toss will be performed.

The patients in the study group will receive local vibration application including different frequency values on the neck and back regions for five consecutive days.

The effect of local vibration intervention on patients' neck pain will be evaluated using the Patients' Global Impression of Improvement Scale. In this scale, patients will be asked to mark their perceived change in pain using the following options: 'very much better,' 'much better,' 'a little better,' 'no change,' 'a little worse,' 'much worse,' and 'very much worse.'

The effect of local vibration intervention on patients' upper limb pain will be evaluated using the Patients' Global Impression of Improvement Scale. In this scale, patients will be asked to mark their perceived change in pain using the following options: 'very much better,' 'much better,' 'a little better,' 'no change,' 'a little worse,' 'much worse,' and 'very much worse.'

The effect of local vibration intervention on patients' paresthesia will be evaluated using the Patients' Global Impression of Improvement Scale. In this scale, patients will be asked to mark their perceived change in paresthesia using the following options: 'very much better,' 'much better,' 'a little better,' 'no change,' 'a little worse,' 'much worse,' and 'very much worse.'

The immediate and short-term effect of local vibration intervention on cervical range of motion will be measured using a 10-inch standard manual goniometer. To measure cervical flexion and extension range of motion, the pivot point of the goniometer will be placed at the external auditory meatus. The fixed arm of the goniometer will be held vertically, and the moving arm will follow along the base of the nostrils. For measuring cervical rotation range of motion, measurements will be taken from behind the participants. The pivot point of the goniometer will be placed at the vertex, while the fixed arm will be kept parallel to the acromion, and the moving arm will follow along with their nose. Lateral flexion range of motion will be taken in front of the participants. The pivot point of the goniometer will be placed over the sternal notch, with its fixed arm parallel to the acromion, and its moving arm will follow along the tip of the participants' nose.