When I took wilderness first aide training about a million years ago, I had two questions for our instructor (an emergency room MD).
The first was about ticks because out here in the desert, there is always a tick or two waiting to pounce. He told us about touching them (don't) and about removing them (use tweezers, get close enough to the skin to get their head, don't twist, pull straight). What I learned on my own was that if their head is buried, I could push hard enough with my tweezers to get it anyway as my victim (Oops! Patient) didn't feel a thing (tick spit acts as an analgesic), even when I inadvertly took out a hunk of skin. And if the ticks are already engorging, expect blood.
The second question was what do you do it someone gets bit by a rattlesnake 50 miles from help (this was before satellite phones). That answer is more complicated.