### Patient: Doctor, I have been feeling very tired lately and have been experiencing tingling and numbness in my arms and legs. I also have been having a lot of headaches and feeling weak. 
### Doctor: Based on your symptoms, it sounds like you may have multiple sclerosis. It is a disease that affects the central nervous system and can cause fatigue, paresthesia (tingling and numbness), headaches, weakness and loss of sensation. We will need to conduct further tests to confirm the diagnosis.