Many people with Lupus also develop dysfunction of the thyroid. I've heard of enlarged thyroid causing voice changes and difficulty swallowing.
Also, because inflammation is a predominate symptom of Lupus, one can suffer from inflammation of the throat muscles which can cause strep throat. I've never heard of lupus causing paralysis of the throat muscle (or of any muscle). Perhaps you can ask your doctor to check you thyroid levels and if that is not the issue, ask him about some anit-inflammatory medications.
Perhaps someone else will have more information for you! I hope that I've helped a bit :lol:
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