Patients in this group will receive TENS treatment for 1 month after surgery.

Patients in this group do not receive TENS application after surgery.

After the surgery, 2 TENS electrodes will be placed on the inner part of the upper arm of the patient's arm on the side where surgery was performed, and the frequency will be 100 Hz, the pulse duration will be 100 µs and the amplitude will be adjusted so as not to cause muscle contraction, and a 20-minute TENS application will be performed.

The Visual Analog Scale (VAS) scale will be used to assess pain intensity. It is a 10 cm line with connecting expressions on the left (no pain) and on the right (extreme pain). The patient is asked to mark the current pain level on the line. It means that the pain intensity increases as you move from left to right.

A tape measure will be used to assess the severity of lymphedema. Measurements will be made bilaterally at 6 different points (Hand circumference, wrist, 15 cm below the elbow, 7,5 cm below the elbow, 7,5 cm above the elbow, 15 cm above the elbow )on the arm.

Shoulder range of motion (flexion, extension, abduction, internal rotation and external rotation angles of the arm) was measured with a goniometer.

The Quick Disability of the Arm, Shoulder and Hand (QuickDASH) Questionnaire and hand dynamometer will be used. In QuickDASH, a higher scores indicate a greater level of disability and severity, whereas, lower scores indicate a lower level of disability.