Hi. I had a total thyroidectomy 10 days ago due to a nodule on my thyroid found to be papillary cancer. I have been taking Synthroid as of the day after the surgery. I noticed 4 days later that I have a really bad rash on my back, sides, hips, arms & breasts. The rash is red, raised & very itchy. The rash area becomes very dark as it heals & there is a large amount of dry skin that forms. It is also spreading. I have been putting hydrocortisone on it & have been taking Benadryl, it seems to help the first areas heal but not stopping the spreading. I am scheduled to see a dermatologist tomorrow but after reading up on it I feel as if I might just be waisting a co-pay. Seems that many have been told its not the Synthroid but only started getting the rash after taking it. This is my case. Is there anything I can do to get rid of this rash??