Some of the vaccines(not sure if it applies to j&j) have an issue where it was supposed to stick to the area it is injected it, they call it being sticky i guess. Typically the vaccines we all get when we are growing up are all put into your left arm, the pain stays there and doesn't go anywhere else. These "vaccines" they are giving us now by moderna weren't made correctly and are causing some huge issues, heart attacks in teenages and brain issues in others.

Hope you are able to get the inflammation down!