Low-Level Laser in Head and Neck Chronic Lymphedema

Inclusion Criteria: * \>18 years of age * \>6 months post HNC treatment * No evidence of cancer confirmed with imaging tests * Having head and neck lymphedema with or without fibrosis * Completion of initial lymphedema therapy * Lymphedema duration between 3-24 months * Ability to speak and read English * Ability to provide informed consent Exclusion Criteria: Patients will be excluded if they have any of the following medical conditions that would prohibit the safe implementation of LLLT: * Pregnancy * Acute infection * Photosensitivity * Chronic inflammatory diseases * Venous thrombosis * Carotid artery stenosis * History of severe trauma * Medication that affects body fluid and electrolyte balance * Use of high doses of non-steroidal anti-inflammatory drugs * Pre-existing skin rash, ulceration, open wound in the treatment area * Active lymphedema therapy or physical therapy * Allergic and other systemic skin diseases