Red long mark 2 days post needles. When to worry?

[Raupe]

So poor DD had her 4 months needles on Saturday. The injection site looked fine that day, but yesterday she developed a raised circular red bump on one leg and an elongated, flat, red, hot mark on the other leg. Today the circular bump is almost gone, but the long red mark is even bigger than before. I know redness and swelling is normal, but when do you start worrying? How long does it take for them to go away? It's very tender to the touch too and she absolutely screams when you accidentally brush past it. So when does the pain ease off?

She had no reaction to her first needles apart from a slightly raised temp. This time she was clearly in pain and deeded panadol and she is still sooky today. I'm just after some advice.

Here are some pics (2 days post vax). The mark is a lot redder IRL

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[Raupe]

Sorry double thread. Mods,lease delete