I've had both. It's part of the injection deal.
As far as I see it, it could be worse. Like the side effects that some experience on other DMDs.
Sometimes I get away with no effects beyond the burning. Those are small victories. But then today for example, I did my injection, went really smooth, no burn, and bam, bump under the skin in that area. Quite a large one too

!
I don't panic about this anymore. It'll go away eventually!