I'm sure seasoned travellers may have other views, but as a relative newbie to distance overseas touring etc the biggest issue I think I will face is the fact that I'll probably be on my own when I go down.
I am a trained first aider in the UK of over 25 years experience, and have done the 'first on scene', but both are designed primarily as triage courses to stabilise the casualty until help arrives.
For many on here you may have to treat yourself, and that is a completely different matter, especially in the wilds where help isn't necessarily close by. So self-treatment advice would be useful maybe?
Live life now - you only get it once.