Inclusion Criteria:  Chronic post-mastectomy pain syndrome (>= 3 months) Able to perform MFR techniques and follow basic instructions >= 18 years old  Exclusion Criteria:  Current chemotherapy Pending surgery during treatment Active infection Active debilitating disease Pregnant Other chronic pain diagnosis beside PMPS Untreated psychiatric diagnosis (not receptive to taking precautions and interventions by treating psychiatrist/psychologist/physician i.e. taking necessary medications) Morbid obesity (body mass index [BMI] > 40) Allergy history of bupivacaine and/or lidocaine