Are you on thyroid meds? If so, it suggests that you are not on a sufficiently high dose. If you are not on thyroids meds, it suggests that you need a higher dose. If the question is why did it go from 7 to 55, that suggests your thryoid disease is progressing. In my case, I had to increase my dosage of synthroid over time becasue presumably my throid was becoming less and less active over time (I have hashimoto's so it was effectively being destroyed by an autoimmune reaction). 175 ug is my current dosage, which keeps my TSH around 1, which is the level I feel the best at. Do you understand that TSH stands for thyroid stimulating hormone, which is what your body makes when it is asking the thyroid to supply it with more thyroid hormone (TH). If your body can't make thyroid hormone for any reason, and you are not supplementing with enough, the TSH levels will be high since the request was not answered. Only when you somehow get enough TH into your system can you shut off TSH production. I imagine there can be other explanations as well. Perhaps there are other reasons to over produce TSH, but you need to discuss these with your doctor since I don't know anything else about you or your medical history.