Acupuncture for Prevention and Treatment of Oral-related Complications Caused by Radiotherapy for Head and Neck Cancer

Inclusion Criteria: * Patients diagnosed with malignant tumors of the head and neck without metastasis * Age ≥18, ≤80 years old * ZPS score ≤2 * Receiving radiotherapy alone or concurrent radiotherapy with a radiation dose of \>50 Gy, including at least one parotid gland * Judged to be able to receive acupuncture treatment, with all needle positions identified as accessible * Signed informed consent form Exclusion Criteria: * History of dry mouth, Sjogren's syndrome, or other underlying systemic condition known to cause dry mouth * Suspected or confirmed physical closure of both salivary gland ducts * Have a phobia of needles or prohibit the use of acupuncture at any acupuncture points * Have a history of head and neck radiotherapy * Have contraindications to acupuncture, including but not limited to bleeding disorders, having skin infections, ulcers or frequent infections * Have taken any medications or herbs within the past 30 days that may affect salivary function, plan to or eventually take such substances during the study period * Poor oral hygiene or severe periodontitis * Poor compliance * Other patients who, in the opinion of the investigator, are not suitable for participation in this study