@murphy1231213 The decision about a Covid vaccination is something to discuss with your allergist. I only mentioned contrast as an example of my body's reactivity toward foreign substances, but that doesn't imply a direct correlation with problems and the Covid vaccines. I also had a reaction to a flu shot years ago and my shoulder swelled. These are the kinds of things to discuss with your doctor before you schedule the Covid vaccine because they will ask for this kind of information when you go. If in doubt, they will suggest that you not take the shot and consult a board certified allergist first. This link has a table for patients who had severe allergic reactions and some of their prior known allergies. FYI, I had an enlarged papilla on my tongue that likely contributed to why I got tongue muscle pain after the vaccine which was localized on that side. That's a concern because the tongue swells during a severe allergic reaction, so heading to the ER was the right thing to do, but I didn't have a severe reaction. 2 days later, I have no symptoms from the vaccination, and I can feel the sensitive spot on my tongue that is still there and was likely there before I had the shot. https://jamanetwork.com/journals/jama/fullarticle/2775646