Dear Dr, I am taking medication for hypothyroidism after RAI treatment 20 years ago. I have little thyroid tissue left now. All was under control T4 in high range TSH of .7 low range. I was involved in a motor vehicle accident 4 months ago and I had a TSH test done the following week. It came back at 4.9 it has never been at this level before all previous tests have been very low. What has happened to my pituitary gland is it in shock. I am still taking my normal dose of thyroxine. It was a very nasty rear end shunt and our car was written off. The other vehicle hit us at a speed of about 80klms per hour and we were stopped at the time. My head did not hit the dash but I was throw forward some way and hit the back of my head very hard on the head rest. It has been 4 months and my TSH is now at 3.6 T4 at 16.5 after reducing my dose slightly over the last 6 weeks. Dr says to go back onto my pervious dose to see what happens before he considers sending me of to the endochrinologist agian. Do I need to see him Now? I had whiplash and mild concussion. I hope you can shed some light on my problem Many thanks Shona