<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing pain and soreness in my breast, and I have also noticed some changes in its shape and size. What could be the problem?  <response>: Based on what you have described, it is likely that you may have a fibroadenoma in your breast. This is a benign breast tumor that often causes pain and can affect the shape and size of the breast. 