Evaluating a Mobile Health Application Intervention for Caregiver Instruction in Manual Therapy for Chemotherapy-Induced Peripheral Neuropathy

Inclusion Criteria: * 18+ years of age. * Must speak and read English. * Have internet access. * PATIENTS: Must have received neurotoxic chemotherapy for adjuvant treatment of cancer. * PATIENTS: Screens positive for moderate to severe CIPN with a 4+ on a 0-10 scale, with 0 being no numbness/tingling or pain in hands or feet and 10 being most severe imaginable. * PATIENTS: Last chemo dose must be 6+ months in the past (symptoms persist in 30% of recipients \> 6 months, this assures those with established chronicity are included, reducing likelihood of spontaneous improvement). Also, no new chemotherapy should be anticipated during the study course. * PATIENTS: Must have internet access. * CAREGIVERS: Members of the patient's natural social support system including spouse, intimate partner, other family member (adult child, parent, other relative), friend or other lay person designated by the patient who agrees to serve as caregiver for the activities of the project. Exclusion Criteria: * PATIENTS: Other potential cause of neuropathy (e.g., diabetes). * PATIENTS: Ongoing treatment with a neuropathy-causing medication. * PATIENTS: History of oncology massage therapy for neuropathy in the last 3 months. * PATIENTS: Unstable lymphedema-if the patient is considered at risk of lymphedema, they can participate because level 2 pressure is deemed safe; however, if patient has had lymphedema, their condition must be declared stable by a certified lymphedema therapist (if stable, level 2 pressure is safe for this study's interventions).