I have a dull headache. Can it be related to thyroid issue?

Hi doctor,

I have been diagnosed with Hashimoto's five months ago. My anti-TPO and anti-TG were 115 and 33 respectively. My TSH was 1.5 and FT4 1.1, so normal function. Two months ago, I started having palpitations and tested my thyroid again. TSH was 0.0018 (suppressed), FT4 2.66 and FT3 7.8. I was hyperthyroid, so I had the TRAb test and it was 5.9. So, I was diagnosed with Graves' and overt hyperthyroidism. I was put on 15 mg Methimazole and 6 weeks later retested my thyroid and my results are, TSH 0.0026, FT4 0.86. So, normal but low range and FT3 is 2.8. Over the last 2-3 days including before these tests, I started having a nasty dull head pressure and lack of focus, similar to what I have had a couple of years ago when my TSH came out 4.1. I also had fatigue and brain fog, which I do not have now. I feel this pressure or tension around my ears, nose, head and throat. I feel my jaw and upper throat tense, had nightmares, irascible and emotionally unstable. It all started rather suddenly. Can it be thyroid related? It is my only known health issue. I do not feel sick and I do not have fever too. But, this sensation in my head and throat annoys me and makes me very anxious. Could it be related to my FT4 going too low? And why is my TSH still suppressed? Why should not it rise with this FT4? Are the TRAb antibodies keeping it suppressed? I will now half my Methimazole dosage to 7.5 mg per day for another three weeks and test again. Does this sound right? Do you have any other advice for me with these symptoms and test results? Please let me know if you need any more information. Thank you so much.

Hi doctor,

Thank you for your answer. As I was pregnant at the time of diagnosis, I did not get any scan. But, I lost that pregnancy. The tests pointed to Graves' though due to the high TRAb and hyperstate. The dull pressure or tension is not really a pain but it feels as if my brain is swollen. It feels like pressure around the ears, temples, inside the throat, etc. It is present throughout the day, more pronounced when I am anxious or stressed out and less when I am relaxed or lay my head against something such as lying down or keeping my head against a headrest. After sleeping I do feel better and it is gradually more obvious during the day. I have changed my medication from taking 3 tablets of Methimazole 5 mg to 1/2 x 3 of Methimazole 10 mg. I bought different concentration pills, but kept the same dosage. I also thought it maybe sinusitis, but I have no congestion. No pain when I press around the nose and between the eyes. I am 29 years old. My mother complained about having dizziness and a chocking sensation but never tested her thyroid. She is overweight. I am 5 feet 6 inches and 117 lbs weight. Please help.