To format a computer means that all your data will be lost. Your operating system, programs, emails, drivers, pictures, everything! All of the updates on your programs will be gone, infarct the every entire program will be gone.
This drop in TSH is an attempt to return circulating thyroid hormone levels to normal. So, a test to measure the amount of TSH in your system will usually show lower than normal TSH when the thyroid is overactive. So, in general, LOWER TSH = OVERACTIVE THYROID / HYPERTHYROIDISM.
The most obvious cause of a TSH change is a change in dosage. But sometimes, the interaction between TSH and dosage changes can be confusing. For example, you may remember your doctor saying your thyroid is low -- and interpret that as meaning that you are hypothyroid. But the doctor may have said -- or may have meant -- your TSH is low -- which is indicative of hyperthyroidism.