Yesterday while lying on bed I felt like something on my neck and when I touched it was a firefly so that I took it from there and threw out. But when I woke up in the morning there was this red mark on my neck spread in a little part. Why was it so. I don't feel any kind of itching or pain or anything while touching on that marks. I don't understand what has happened. Even I didn't feel like the firefly biting or piercing or anything. What will be the reason. Is there any serious issue. Or is it a normal thing to be avoided.