A Registry to Evaluate the Flexitouch System and Flexitouch Plus for Treatment of Head and Neck Lymphedema

Inclusion Criteria: * Age ≥ 18 years * A diagnosis of head and/or neck lymphedema * Must be able and willing to participate in all aspects of the registry and provide informed consent prior to registry participation * Head and chest measurements within the following: * Crown of head circumference: ≤ 72 cm * Chest circumference: ≤ 158 cm * Prescribed the Flexitouch system or Flexitouch Plus Exclusion Criteria: * Uncontrolled hyperthyroidism or parathyroidism (for which endocrinologist recommends against neck compression) * Carotid sinus hypersensitivity syndrome * Symptomatic carotid artery disease, as manifested by a recent transient ischemic attack (within 30 days), ischemic stroke, or amaurosis fugax (monocular visual ischemic symptoms or blindness) * Symptomatic bradycardia in the absence of a pacemaker * Internal jugular venous thrombosis (within 3 months) * Increased intracranial pressure or other contraindications to internal or external jugular venous compression * Acute radiation dermatitis, unhealed surgical scar, unhealed or open wound(s), or surgical flap less than 6-8 weeks post-operative * Facial or head and neck dermal metastasis * Acute facial infection (e.g., facial or parotid gland abscess) * Any condition in which increased venous and lymphatic return is undesirable * Heart failure (acute pulmonary edema, decompensated acute heart failure) * Subject is pregnant or trying to become pregnant * Acute venous disease (acute thrombophlebitis, acute deep venous thrombosis, acute pulmonary embolism)