I recently spent 4 days in hospital so that I could have twice daily intravenous antibiotics to control a hand infection which developed from a very small finger cut. The cut on my middle finger (gained while changing a bathroom tap washer) barely drew any blood, but after a few days my finger started to swell and develop raised itchy bumps. The swelling increased, moving down my finger into my palm. Oral antibiotics were unable to control the infection and I ended up being told by my doctor to go to Emergency for admission to hospital so I could be given IV antibiotics. I'm neutropenic due to my CLL and as neutrophils are our first defence against infections, I was at a disadvantage, which was further complicated by my inability to have a range of antibiotics due to allergy.
Needless to say, I'll be wearing gloves more often now and I'll be taking more care to ensure any cuts and scrapes are promptly cleaned and bandaged.
Here's Mayo Clinic's Cuts and Scrapes First Aid information:
The accompanying image is cropped out of a shot of a drip (not in my IV) that was captured in a 120 frame per second burst capture. I created an animated GIF from the cropped images which I hoped would work here, but sadly it didn't, so you'll just have to be satisfied with the one frame.