I have just turned 22 and have been diagnosed with an underactive thyroid. I began loosing my hair 3 years ago and couldn't understand why I was loosing it. I'm 5ft 7 and weigh 8 stone 13 but since being on thyroxine I have Lost 5 pounds (which i don't like) doctors said this would happen. I began on 100mg off Levothyroxine and within a day off taken it was severely I'll with sharp shooting pains in my head to the point whereby struggled washing my hair because off the pain. Symptoms became worse and worse and then I was signed off sick to rest. Nothing eased it and after countless doctors appointments I was put on beta blockers because my blood pressure is high. Nothing helped and so I asked to be cut down to 50mg . Symptoms have improved my not fully solved. The main concern I have is my hair, as I have been gradually getting thinner and thinner hair over the course off the 3 years, since taking levothyroxine and within days off taking I began loosing clumps off hair , 5 weeks on and I got 2 thin patches which at this rate will be bold patches in a few weeks. My hair is so thin that I have no longer really any hair on my right side. I'm devastated by the sheer loss and everyday I wake up knowing that today I will loose more hair and the next and the next... Doctors have told me it will calm down but at this rate I wont have anyhair. I don't understand my blood results and of something could shed some light on them and help me see that there will be light at the end off the tunnel ..