David - I asked my physical therapist yesterday if she had any written literature to pass along, and she didn't. She said that, until recently, she had only done lymphatic drainage on arms and legs. But she's had a few head and neck patients recently due to, I suppose, an increase in head and neck cancer. The head and neck technique is actually fairly new to her, but she does one heck of a job, and my neck circumference was down about a half inch in just 2 weeks!!!