Interesting that you’ve had half your thyroid removed. It is possible, based on a research article I found, for calcification of the thyroid to occur after a partial thyroidectomy, but it’s rare. So is ES. Thsu,that’s not to say that calcium hasn’t replaced your thyroid, but again, the opinion of an endocrinology expert would be required to diagnose that. Symptomatic calcification of a thyroid lobe and surrounding tissue after radioactive iodine treatment to ablate the lobe - PubMed
The styloids & hyoid bone are connected via the stylohyoid ligaments (one extends from the tip of each styloid & extends to the lesser horns of the hyoid on the left/right). When the styloids are normal length & s-h ligaments aren’t calcified, the hyoid bone is able to move freely (though minutely) when you talk, sing, cough, sneeze, breathe, burp, hiccup, etc. When the styloids elongate along the s-h ligaments, the hardened ligaments affect the hyoid bone’s ability to move normally in essence, the calcified ligaments “tether” the hyoid bone which contributes to pain w/ swallowing, talking, & in the neck. If the greater horns of the hyoid also elongate, they can run into the cervical spine & carotid arteries which causes other awful symptoms. When the thyroid cartilage calcifies to the extent yours has, then Clicking Larynx Syndrome can occur. These are all things you can Google for more basic information about them. We’ve had several members who’ve been diagnosed & had surgery for Clicking Larynx Syndrome. Here’s a link to a research article that discusses it - Clicking Larynx Syndrome
85-90% IJV compression is quite serious. We’ve had members w/ terrible symptoms with only 50% compression. You need to get that taken care of as it’s depriving your brain of the ability to get rid of deoxygenated blood & toxins & is restricting CSF flow. The blood coming into your brain through your internal carotid artery is able to flow in at a normal rate, but due to your compressed IJVs, the deoxygenated blood, etc, can’t flow out at the same rate, so intracranial hypertension (IH) has developed which causes symptoms such as migraine headaches, visual changes, brain fog, tinnitus/pulsatile tinnitus, & potentially other problems.
Typically the hyoid bone does not affect the vagus nerve or jugular vein but the styloids, calcified stylohyoid ligaments & C1 can all affect the jugular & vagus nerve as can surrounding soft tissues in your neck.