<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing stiffness all over my body and my lips have also been swelling. I am also feeling some symptoms on my face. What could be the problem?  <response>: Based on the symptoms you have described, it is possible that you have multiple myeloma, a type of blood cancer that affects the plasma cells in the bone marrow. We will need to run some tests to confirm the diagnosis. 