I bought a very cheap knife at the local flea market. $12. And I overpaid.
I promptly brought it home. Sharpened it. And oiled it. I turned it into a workable, though still cheap, stiletto.
And then promptly cut myself with it. Above you can see said knife and the subsequent field dressing.
Maybe the wound could have used some professional attention. My 11-year-old certainly thought so. It did bleed a lot. Perhaps it deserved a stitch or two.
But I just slapped on a little gauze and some athletic tape.