<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing knee pain, and now I have a lump or mass on my wrist that is also causing pain. What could be the problem?  <response>: Based on the symptoms youve described, it is possible that you have a ganglion cyst. This is a non-cancerous lump that can develop along the joints or tendons, and it often causes pain or discomfort. I recommend scheduling an appointment so we can examine you and determine the best course of treatment. 