http://www.cancer.gov/cancer_information/doc_pdq.aspx?viewid=66D23623-3E9C-4BCF-8C09-902C2AFE0F06
National Cancer Institute, National Institutes of Health
Help for the cancer patient with issues related to taking care of pain -- why it is important and common worries that may keep a patient from seeking relief. Also offers a guide for talking with a doctor or nurse about pain and referrals for additional information and resources.