Can being hypo cause back pain? I have suffered with some back pain on my left side that runs down my leg for a few years. Since I started treatement for my Hypo thyroid my back pain is much worse. I also notice that my muscles get sore very easy. Is this common?
The back pain you describe sounds like sciatica. It's caused by a pinched sciatic nerve and is unlikely to be related to your hypoT. A good chiropractor can do wonders to re-align your vertebrae, which will alleviate that kind of pain.
As for the muscle pain... Muscle metabolism needs a steady, adequate supply of T4. Without it, muscles can remain weak despite concerted strength training exercise. Muscle achiness is a common thyroid symptom.