All patients in the control group were given a traditional physiotherapy program applied in lumbar disc herniation for 4 weeks (20 sessions) and 5 days a week.

As a traditional treatment, patients received hot packs, conventional transcutaneous electrical nerve stimulation (TENS), therapeutic ultrasound and exercise.

Hot packs used as superficial heat were wrapped in a towel and applied to the waist area for 20 minutes.

Conventional TENS used as analgesic current were applied to the waist region for 20 minutes with 4 electrodes with 2 outputs, with a current time of 180 ms at a frequency of 80 Hz.

It was applied with a dose of 1Mhz for 5 minutes with ultrasan (Chattanooga Intelect Mobile Combo model device) used to heat deep tissues.

Waist exercises were asked to be done during the treatment, with 10 repetitions, each exercise twice a day (morning and evening).

In addition to the traditional physiotherapy program, tool-assisted soft tissue mobilization was performed 3 times a week (12 sessions with 1 day interval) in the experimental group.

Instrument Assisted Soft Tissue Mobilization (IASTM) treatment was applied to ilicostalis lumborum, priformism, gluteus medius, erector spinas, quadratus lumborum muscles, superficial and deep fascia. Before applying the application, petroleum jelly was applied to the area and the tool was slipped.

IASTM treatment was applied to the treated muscle fibers for 6 minutes, each technique (SWEEP-FAN-BRUSH-SWEEP techniques) with 8-10 repetitions.

Sweep: Applied in all directions at 30 or 60 degree angle. Fan: It was applied by moving one side fixed arm at 30 degree angle. Brush: It was applied in straight steps at 30 degrees angle. Each stage of IASTM treatment was done by the physiotherapist.

All patients in the experimental group were given a traditional physiotherapy program applied in lumbar disc herniation for 4 weeks (20 sessions) and 5 days a week.

In addition to the traditional physiotherapy program, the patients in the experimental group were subjected to tool-assisted soft tissue mobilization 3 times a week (12 sessions with 1 day interval).

All evaluations were repeated to all patients in the experimental and control groups after four weeks.

Personal information (name, surname, address, telephone, marital status, educational status, occupational and health security), demographic and clinical information (age (year), gender, height (cm), weight (kg), BMI of all patients participating in the study (calculated by the formula of the ratio of body weight to neck squared (kg / m²)), information about the disease, drugs used for lumbar disc hernia, other drugs used, presence of chronic disease, surgical history, smoking and alcohol use] by questioning '' Demographic Information Forms '' recorded.

The pain intensities of the patients at rest, during the activity and at night were determined using the Visual Analogue Scale (VAS). VAS is an easy-to-apply scale, as values that cannot be measured numerically can be digitized and quickly understood.

The patients were asked to mark their severity (rest, activity, night) on a 10 cm line. The starting point of the truth was '' 0 '' '' I have no pain '', the end point was '' 10 '' '' I have pain of unbearable severity ''. The point that the patient marked on the right was measured with a ruler and recorded in "cm". Localization of the pain, its frequency and the causes that increase and decrease pain were questioned and recorded. The Turkish validity and reliability study of the scale was performed.

The limitation of flexion, extension, lateral flexion and rotation movements of the lumbosacral joint was measured using a universal goniometer. All normal joint movements were repeated 3 times and the average of the obtained values was recorded in degrees.

Quality of life was assessed with the survey "SF-36 (Short form-36) quality of life". SF-36 is a generic scale that evaluates the overall health status. It consists of 36 questions that evaluate 2 main (physical and mental component) and 8 sub parameters (physical function, emotional function, physical role, social function, mental health, pain, general health and vitality). The score of each subgroup is evaluated between 0-100. A high score indicates that the quality of life is good. The Turkish validity and reliability study of the SF-36 questionnaire was conducted.