Ok, so about a week ago when I woke up in the morning I noticed what looked like a small pin-prick on my thumb, like the hole of a needle. Now, I am not a healthcare worker, and I don t use needles, and I don t spend time with anybody who uses needles or has access to them. This small round puncture wound on thumb wont heal. I can t imagine what could have caused this, other than a needle. Any ideas on what it could be?