It is usually nearly impossible to feel parathyroid tumors. Even when large, they tend to be soft and squishy, and don’t cause pain. Sometimes, if you have a large and deep adenoma, you can feel something when swallowing, though this rarely causes actual difficulty swallowing.   What you are describing actually sounds more like thyroiditis, or an inflammatory condition of thyroid. The most common form is Hashimoto’s thyroiditis (which is actually fairly common, though you might not have heard the name). It can cause pain and tightness in the neck, where the thyroid is, and can give a feeling of difficulty swallowing when there is more inflammation. It tends to be a condition that waxes and wanes, so you won’t always feel the pain or tightness.    We do not diagnose parathyroid tumors on imaging studies. The only way to know if you have a parathyroid tumor is to check calcium and PTH. If these are normal, then the mass on ultrasound is a thyroid nodule. Nodules are common in cases of thyroiditis.