I finished five years of tamoxifen three months ago. For the last four weeks I have had terrible aches and pains in muscles, joints and nerves and they move around from arms to legs to hands, left side then right side. My doctor did blood work that showed inflammation, but otherwise normal. She is sending me to a rhymatologist. My oncologist said he s sure it s not cancer related, but ordered a bone scan. I don t want more radiation. I had DCIS stage 0 cancer. Just want to know if this is a side effect of ending tamoxifen after five years. No problems taking it, but the pain is unbearable.