Anyone else had Moderna and got "Covid arm" - heat/itching/swelling around the injection site, a week or so after? Mine kicked in on Wednesday, a week after my first injection, and it's bloody massive now - the affected bit is like right round my whole upper arm, and about 15cm long. I'm wondering whether to tough it out or go to the doctor. Last year I had an insect bite that swelled this much and I ended up getting antibiotics and heparin. I mean it's obviously not an infection, but is there a point where you're supposed to tell someone? I don't know.