Last March I went to the GP with muscle pain in hands, neck and back. Initially told I had sciatica. Took the naproxen but still didn't improve. Returned to GP who did a blood test and my B12 returned at 87, which is very low. I had been having symptoms of B12 deficiency such as fatigue, brain fog etc. but didn't really think it was any more than being an overworked teacher. Whilst I was being treated with B12 injections I was also sent for a nerve test on my hands and diagnosed with early stage carpal tunnel. Despite having loading doses and 2 twelve weekly top ups of B12 my symptoms have not allieviated. I returned to GP as the pain in my hands and now legs and feet is unbearable at times and the GP gave me a steroid injection in my left wrist but still nothing has changed.
My fatigue seems almost normal now; asleep by 8 most evenings and an afternoon nap at weekends. More recently I have felt my throat feel tight and notice everything I eat and drink. I also weighed myself and realised I have put on over 2 stone since Easter but I've always struggled with my weight.
Is there a link between underactive thyroid and B12 deficiency? Should I ask my GP to test my thyroid function? I'm so tired and all it seems is that I'm constantly complaining and 'ill'.