Inclusion Criteria:  >18 years of age 3-12 months post-HNC treatment No evidence of cancer Diagnosis of head and neck lymphedema and referral by their oncologists or care team Not in active lymphedema therapy or physical therapy Able to provide informed consent Able to perform self-manual lymphatic drainage (self-MLD) Having an electronic device (a computer, tablet, iPad, laptop, or smartphone) and internet access at home  Exclusion Criteria:  Active cancer Acute infection Acute congestive heart failure Acute renal failure Acute cardiac or pulmonary edema Sensitive carotid sinus Severe carotid blockage Uncontrolled hypertension Jugular vein thrombosis Significantly severe lymphedema (e.g., severe periorbital swelling)