Injuries are bound to happen in martial arts. Robert Cartaino posted a really nice answer on the Fitness & Nutrition meta a year ago where we had the same issue:
Like anything else you read on the internet, there's a degree of
responsibility and caution that falls on both the askers and
answerers. Don't ask us when it is okay for you to resume
weightlifting if you've just be diagnosed with heart problems. It
sounds trite to constantly hear "Talk to your doctor", but
sometimes, it is the only advice. At the same time, folks answering
questions shouldn't throw around wild generalities when the author has
not provided sufficient information.
The Fitness & Nutrition FAQ states
wellness, general health, medical advice and injuries unrelated to
as off-topic, but we consider "injury prevention" as on-topic so long as there is a connection to fitness. I think we should take a similar approach here. Preventing and treating injuries related to martial arts (and note these subjects should be handled with care) are on-topic. I think what's been discussed on the site about injury so far is appropriate (even though not necessarily in depth).
For this site, I would consider this example to be on-topic:
and this as off-topic:
That question is too general in its current format, but something like what Jack B. Nimble suggested could make it better and more appropriate. I agree with what David H. Clements proposed in his question, "that specifically treating injuries in general after the fact is off topic, while 'how do I practice while injured' and 'how can I help keep from getting injured' are both on topic."