### Patient: Doctor, I have been experiencing joint stiffness and a knee lump, along with facial pain and extreme fatigue. Also, I've noticed that I get very angry at even small things. Can you tell me what might be wrong with me?
### Doctor: Based on the symptoms you have described, you may be suffering from rabies. It is a rare but serious viral infection that affects the nervous system and can be transmitted through the saliva of infected animals, such as dogs or bats. You should seek medical attention immediately to receive treatment.