In January I came down with a fever and lost about 10 lbs. The fever lasted about 3 days then went away, however, I had some pretty nasty symptoms develop soon after. I had about 4 seperate episode of drenching night sweats, I developed twitching all over my body, and had a general feeling of weakness/tiredness. Also, I had and still have ear pain in my right ear. My doc told me it was TMJ??? To this day I still have the muscle twitching, I have not had a night sweat since January, but I do still feel tired. I had multiple doc visits and had a lot of blood work done all of which was normal. I even went to a Neuro and had a lot of nerve conduciton type studies including an EMG and everything was normal. Two months ago I noticed a lump on what I believe to my thyroid. It is off to the right side and moves when I swallow, but, it is a solid round lump. It has grown since I first noticed it. I am worried that it is cancer of the thyroid that is not showing up on any blood work. Is it posible for cancer to cause muscle twitching? I forgot to mention that after I lost that weight I gained it back plus put on an additional 20 lbs. I am going to an Endo in two weeks. Any insight would be greatly appreciated!