Hi and welcome to YT!   
It could be a bruised muscle. You could try a ice pack wrapped in a towel followed by a hot pad on low,wrapped in a towel. If you don't have one, warm water in a baggie will work. Switch them on and off, after the other has calmed down. (cold,calm,warm,calm)   
Just the same as humans.   
Also massage the whole leg with a light finger, This way your looking for any bump that you might have missed and loosening the muscle, if that is what it is.   
If that doesn't work, off to the vet.   
Hope this helps.   
Good luck!   
Let us know she is doing!     |