It's blurry in the picture.

Yesterday morning, something bit me. I didn't realize for sure that it was a bite until today when the swelling had gone down some. Originally, it was this really big lump right behind my elbow with a hard bump in it, and it was a big bruise. It hurt.

 

Now, the bump has gone down some, there's a mosquito bite-like thing in the middle of the bruised area. I'm a little worried about it.

 

Does anyone know what it is?

 

Also, it's pretty difficult to take a picture of your own elbow.

Done