A Tick???

[Mochelem]

I'd also double check (if you didn't already) that you got the whole tick out. Sometimes part of the head can stay attached.

I just looked at for a long time, I even stretched the skin in that area so I could see between the scales, I couldnt see anything... The snake does have a small mark where I pulled the tick from.. If you look close it looks like it has a scale missing.....