### Patient: Hi doctor, I have been experiencing knee stiffness and tightness, along with leg and ankle swelling lately. I also have some pain in my knee and elbow. What could be the issue?
### Doctor: Based on your symptoms, it seems like you have joint effusion. Joint effusion is the accumulation of fluid in the joint capsule, which can cause stiffness, swelling, and pain around the affected joint. We'll need to run some tests to confirm the diagnosis and determine the right treatment plan.