Talk to Endocrinologist on Thyroid Health Concern

I recently visited a doctor due to back head pain. During the consultation, the doctor suggested that the issue might be linked to thyroid imbalance and advised tests. My S/TSH result came back 9.94, indicating hypothyroidism. The doctor prescribed Thyrnorm 05 mcg, Crite, and Hypiyrid. He also recommended a thyroid scan to check gland activity and rule out complications. I want to understand my condition better, the purpose of the scan, and the next steps for proper management