### Patient: Doctor, I've been having some strange symptoms lately. My eyesight has been getting worse, and I have been experiencing weakness in my elbows. Additionally, I've been having upper abdominal pain and find myself constantly nail-biting. What do you think could be causing these issues? 
### Doctor: Based on your symptoms, it sounds like you could be experiencing Uveitis. This condition is an inflammation of the eye, which can lead to diminished vision. However, it can also cause other symptoms such as joint pain, weakness or numbness in certain areas of the body, and occasionally gastrointestinal issues. I would recommend we investigate further so we can determine if this is indeed the cause of your symptoms.