I need some better definitions.

To me first aid is keeping someone alive until secondary aid (i.e. qualified) arrives. Perhaps also stopping deterioration until secondary aid arrives such as stabilising fractures when secondary aid is miles or hours away.

Day to day minor niggles that do not need secondary aid, e.g. nicks, scrapes and bruises are what some people here are calling boo-boos and are completely treatable without secondary aid so should not come under the heading of 'First Aid' as there is no secondary needed.

So perhaps:
First aid; immediate unqualified treatment. Normally short term until qualified intervention and triage. 'Good Samaritan'.
Secondary aid; follow up qualified treatment. Through to recovery. Often relocation needed.
Everyday life; no qualified intervention expected for recovery.

I would like some better terms that are self descriptive.