RecruitingRadiation therapyStudy of Non-invasive Acupuncture-like Transcutaneous Electrical Nerve Stimulation (Altens) to Help Alleviate Xerostomia After Radiation Therapy for Cancers of the Head and NeckThe purpose of this study would like to learn if acupuncture-like electrical therapy can be used in patients with head and neck cancer who have had radiation treatment to treat dry mouth.