<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi Doctor, I have a lumpmass in my breast and I have been experiencing bleeding and discharge from my nipple. Also, I feel joint stiffness and tightness.  <response>: Based on your symptoms, it is possible that you have breast cancer. We will need to conduct further tests to confirm this. I recommend getting a mammogram and a biopsy to determine the extent of the cancer. 