<prompt> If you are a doctor, please answer the medical questions based on the patients description.in my case total thyroductmy done for thyoried CA after that i had taken taken nuclear medicine treatment I -131 for thyroid CA before 9 months As per recommendation of Jaslok hopital From last month i had stopped thyroxine to check reocurrance of CA, now the results had come no reoccurance of ca seen in all test but i am facing severe cramps in my whole body , what is the reason behind those cramps ???  <response>: Hello! Good Day! Ive read your concerns and will try to break down the answers for you. Whole body cramping can be from several factors- electrolyte imbalance, deny Chat Doctor. However, in your case, it might be caused of lack of thyroid hormones since you stopped your thyroxine. If I was your treating physician, I will request for the following: thyroid function tests, electrolyte panel Na, K, ICA, CBC. Treatment depends on your results. 