### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi, I was diagnosed with Graves disease 5 years ago. When I started taking carbimazole to treat it, I experienced tiredness and sore muscles/joints. The specialist said these were normal side-effects, but after stopping the treatment after 1.5 years, these symptoms did not go away. And I developed numbness and tingling in my left foot, which gradually spread up my left leg, and down my left arm, into my left hand. I ve seen various specialists, including a neurologist to rule out MS, and had 2 MRI scans over the past 4 years, and had a lumbar puncture done approx 3 years ago. All tests came back negative. I ve now been discharged from all specialists, and since my carbimazole treatment, I ve been in remission for Graves . The neurologist did say that it s possible (though unlikely) that I might develop MS at some stage, and to go back if my symptoms develop. I ve since been diagnosed with fibromyalgia, chronic fatigue syndrome, and have tried all treatments but to no avail. I m currently medication-free. The last few weeks, I ve been much more sensitive to sound, light and smell. Please advise. Thanks.

### output:

Hello! Thank you for asking on Chat Doctor! I carefully read your question and would explain that your symptoms don't seem to be related to MS. Your repeated MRI can confirm this. But, Graves is an autoimmune disease, and it is commonly associated to some autoimmune neurological disorders like MS or Myasthenia graves. Neuropathy from thyroid dysfunction can not be excluded either. So, I would recommend performing some other tests: - a nerve conduction study, including repetitive nerve stimulation to investigate for neuropathy or myasthenia syn Chat Doctor.  - vitamin D plasma levels for possible deficiency-vitamin B 12 plasma levels for possible deficiency. If all the above tests result normal, you should consider chronic fatigue syn