I recently had an ingrown toenail. The last time I had one (in high school) I let it get so bad that after gym class my white sock would be entirely red with blood. I had to go to a pediatrist who ended up using some kind of special scissors to cut a large chunk of my toenail off to fix it and wrapped it up for a while.
Presuming I would have to go through this again, and would need a referral, I went to my local physician. Not surprisingly, said it was indeed an ingrown toenail. But, surprisingly, her first suggestion was to prescribe me some antibiotics!
That was the first time in my life I had wondered about the suggested treatment, and I actually asked her "how would that help?" And I can't remember her answer, but it seemed really dumb, so I just said "no thanks" and asked what the alternatives were, and she said "to just let it grow out" after which I would be all fine.
Now, recalling this story, I remember someone telling me about "BRAIN" or something like it, an acronym that includes "risk" and "alternatives" and "intrusive" and something else.