<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello I have muscle fatigue, soreness and twitching in my arms in legs for the past two in half months. I have also had blurry vison in one eye for almost two months and tingling in extermities at times. I have had a normal emg and brain mri and bloodwork during this time what could it be?  <response>: Hello! Thank you for asking on Chat Doctor! Regarding your concern, I would explain that your symptoms could be related to different causes: - thyroid gland dysfunction- epilepsy seizures partial epilepsy seizures- vitamin D deficiency-anxiety. For this reason, I would recommend consulting with your doctor for further tests: - thyroid hormone levels-blood electrolytes- vitamin D plasma levels- a brain EEG. Hope to have been helpful! Kind regards, 