Years ago I worked with horses full time. Many an hour spent in the pissing rain, forking over the muck heap.
I started to notice a sharp pain in my navel, when I bent over or sat down, worse when I absently washed it in the bath or shower. Eventually, alongside the stabbing pain, came a smelly discharge. I tried to keep it clean but the goo kept staining my clothes and the pain wasn't getting any better.
When it was looking red and sore, I blobbed a load of Savlon in there one night and gently swabbed it around with a cotton bud. I did that morning and night for a couple of days, and one evening I met resistance.
I poked with the cotton bud, and with an audible plop and a surge of pus, out popped a piece of straw about an inch long.
Same thing with a splinter - shoved my hand in my handbag and encountered a Starbucks wooden stirrer. Splinter went right in at the tip and under my nail. Couldn't get it out, but my finger swelled over the next few days. Overnight, plaster with Savlon, next morning, one squeeze and it erupted and spewed out the splinter.
Love Savlon, ahhhhh the relief.