Diagnosis of Hypothyroidism Some doctors only look at TSH levels and nothing further. If someone is suffering from several symptoms, such as weight gain even though someone is eating well, fatigue, issues with menstrual cycles, hair thinning or loss, a medical professional should look at hypothyroidism. A patient may not necessarily need a medication like levothyroxine, but may need a blood test to show levels of other things such as zinc, selenium, copper, and iodine, Gamble, J. (2016). By taking supplements for these low levels can put off having to take medication. Gamble, J. (2016). The Thyroid Epidemic. Journal of the Australian Traditional-Medicine Society,22(2), 114-114.