As it is likely that the skin has been broken, injectable antibiotics are useful, something like a Betamox LA, which gives you a couple of days of broad cover
Also an antibacterial/soothing cream/spray over the affected area would be worth a go.
I'd imagine it is rather painful so an injection of a meloxicam would also be nice.
Otherwise, usual TLC sort of things like vitamins - by injection or drench, nutrition (can use something like a twin lamb drench (which usually has vitamins in also), or tasty treats to get her eating well) and plenty water