Effects of Far Infrared Rays and Transcutaneous Electrical Nerve Stimulation on Short Term Prognosis of Head and Neck Cancer Patients Receiving Curative Treatment

The goal of this clinical trial is to determine whether far-infrared therapy and transcutaneous electrical nerve stimulation (TENS) can improve postoperative side effects in patients with head and neck cancer. The main questions this study aims to answer are: Can far-infrared therapy and transcutaneous electrical nerve stimulation reduce pain and improve neck range of motion? Can far-infrared therapy and transcutaneous electrical nerve stimulation reduce inflammation? Researchers will compare three groups: Group A: control group; Group B: transcutaneous electrical nerve stimulation; Group C: far-infrared therapy combined with transcutaneous electrical nerve stimulation, to evaluate differences in pain, neck range of motion, and inflammation. Participants will receive the assigned intervention in the morning and evening for five consecutive days. Outcome measurements will be conducted on the first and fifth days.