Is "傷" a subset of "怪我"?


I would like to clarify the differences between `傷{きず}` and `怪我{けが}`. Are
these assertions correct?

>   * `傷` is used exclusively for minor cuts and abrasions to the skin?
>   * `怪我` can also be used for cuts and abrasions, as well as bruising or
> other minor injuries. `怪我` is also used for major injuries such as broken
> bones, concussions, etc?
>

So, calling any type of injury a `怪我` is technically correct. And, using `怪我`
allows you to say `怪我した。`

Using `傷` allows you to be more specific as to the type of injury, but then
you must say something like `傷がついた。`

My strategy is to always say `怪我する` because I don't need to worry about
sensing the distinction between `傷` and `怪我`, and I like how `怪我する` sounds. Is
this a good policy? Is it ever critical that I say `傷` instead of `怪我`?




傷 refers to damaged skin/surface resulting mainly from an injury, and 怪我
refers to injury itself. While, by its nature, 傷 does not usually refer to
life-threatening injuries, I don't think 傷 is a strict subset of 怪我.

  * 腕に傷がある: OK
  * 腕に怪我がある: Understandable, but slightly unnatural to me
  * 昔の傷: An old scar
  * 昔の怪我: (refers to an old event rather than a scar)
  * 怪我をする: OK
  * 傷をする: Wrong




傷 refers to damaged skin/surface resulting mainly from an injury, and 怪我
refers to injury itself. While, by its nature, 傷 does not usually refer to
life-threatening injuries, I don't think 傷 is a strict subset of 怪我.

  * 腕に傷がある: OK
  * 腕に怪我がある: Understandable, but slightly unnatural to me
  * 昔の傷: An old scar
  * 昔の怪我: (refers to an old event rather than a scar)
  * 怪我をする: OK
  * 傷をする: Wrong

