I Went To Jamaica A Few Days Ago And Fell

I went to Jamaica a few days ago and fell running in the sand. I got a pretty nasty sand burn on my shin. Now my right leg is swollen. The past two days it was extremely shiny. Now its just swollen and when I stand after sitting for a while I get lots of pain (assuming from the blood flow). Other than that I can walk on it with no problem, no bruising either.