The use of CAM therapies by breast cancer patients and the communication of their CAM use to their physicians relative to lymphoedema symptoms and other factors were studied. Breast cancer patients (n = 148) in the State of Vermont, USA, were interviewed 2–3 years after their primary surgery using computer-aided telephone interviewing methods. Questionnaire items included demographic information, treatment, CAM use, lymphoedema symptoms, and other measures. A large proportion (72.3%) reported using at least one CAM treatment after surgery. The most frequently used treatments were vitamins and non-food supplements (72.3%), with herbal treatments, meditation and traditional massage each being reported by about one-fifth of the women. Age, education, adjuvant chemotherapy, and extremity swelling were associated with use of more CAM treatments in a regression model. A large proportion (73.8%) of CAM users reported their CAM use to their physicians.