I once got a very tiny splinter in the tip of my index finger one morning. I mean just a tiny black speck. I annoyed me, so I dug it out that afternoon. By later that evening the whole end of my finger was red and swollen. I woke up in the night with my hand hurting. The whole finger was swollen, and the end was turning purple and black. I went to a doctor the next day (Sunday). They looked at it, gave me an antibiotic shot and prescription, and said that I need to see a hand specialist. By this time the finger was purplish black to the first joint.
By that evening, less than 36 hours after first getting the tiny splinter and with all the antibiotics, my finger was double its normal size. I also had red streaks run up my arm to the shoulder. This was only about 24 hrs from the first real sign off trouble.
I got an emergency appointment to see a hand surgeon the next morning. To shorten story, I ended up loosing the whole end of my finger and being on drugs for a month. I had gotten a infection in what they call a "felon pad" in the tip of my finger. The surgeon said that if I had waited a few more hours, I would have lost the whole finger and ended up in the hospital with sepsis.
This just shows how a very small, almost non-existent, injury can end up threatening your life. I am a lot more conscious and careful with splinters now, and wear gloves more than I used to.
CliffH.