As jo P says salt water will help It looks to me like she got something in that the only thing you gotta be real carefull of is if it starts swelling up the leg!
Like i said before ,if your lucky it might bust and then theres a good chance it might come out!
But if it dont go down in a day or two ,you will have to take her to a vet!
Thats a fcuker of an injury mind As most know on here my Tias been through the same this year ,in the end i have had 2 opps donemy Tias hung around on and off for 5months!( shes only just got over it!