Inclusion Criteria:  Not have had knee replacement surgery before, Having unilateral prosthesis surgery, Not having a pacemaker or arrhythmia, Not having neurological deficit, Absence of sensory loss, paresthesia or hyporeflexia, Not having local or systemic infection, Not using opioids or TENS before surgery, Not having history of chronic pain, Not having history of alcohol or drug use, Not having a psychiatric history, Not having been done to apply epidural analgesia in the postoperative period, Not having serious complications after surgery, Not having a history of neurological disease (SVO, epilepsy, dementia, etc.), Not having active tumor or cancer, Not having fractures or dislocations, Absence of signs of venous thromboembolism, Having an ASA score of I and II, Agree to participate in the research and Know how to read and write  Exclusion Criteria:  Undergoing previous knee replacement surgery, Having double-sided prosthesis surgery, Having a pacemaker and arrhythmia, Having a neurological deficit, Having loss of sensation, paresthesia or hyporeflexia, Having local or systemic infection, Having been used opioids and or TENS before surgery, Having a history of chronic pain, Having a history of alcohol or drug use, Having a psychiatric history, Administering epidural analgesia in the postoperative period, Developing serious complications after surgery, Having a history of neurological disease (SVO, epilepsy, dementia, etc.), Having an active tumor or cancer, Having fracture or dislocation, Having symptoms of venous thrombosis, Not having ASA score I or II, Not agreeing to participate in the study, Illiteracy