Hi Doctor, I m Trevor.I was playing with a small salt shaker and it broke,While I started picking up the smaller pieces I got pierced a tiny bit in my thumb by a tiny shard of glass and it bled a tiny bit.It looked like a grain of sand.I squeesed it to make sure there wasn t any glass and it seemed fine.But when it developed a scab a few days later the area I felt sort of sharp sensation.Could it be possible that I have a tiny piece of glass in my thumb?It s been on my mind very often.