Clinical Research Directory

Inclusion Criteria: 1. Patients pathologically diagnosed with non-metastatic head and neck malignant tumors; 2. Age range: 18 to 65 years old (including 18 and 65 years old); 3. Eastern Cooperative Oncology Group performance status of ≤2; 4. Radiotherapy or concurrent chemoradiotherapy is required; 5. The main organ functions well; 6. Sign informed consent. Exclusion Criteria: 1. Allergic constitution (such as those known to be allergic to two or more drugs); 2. Patients who plan to use drugs that can cause or worsen oral mucosal inflammation (such as anti EGFR monoclonal antibodies, immune checkpoint inhibitors, etc.) after the start of radiotherapy; 3. Use of antibiotics, antifungal drugs, or antimicrobial mouthwash within 1 month of the study; 4. Poor oral hygiene and/or severe periodontal diseases; 5. History of head and neck radiotherapy; 6. Deemed unsuitable for the study by the investigators (concomitant with any other severe diseases).