If your team is moving through a terrain that has a lot of vegetation you will sometimes have to manage brush bites.
That is when the vegetation itself sticks to or bites the athlete themselves. I see this a lot when an athlete is in a hurry to go to the restroom and gets a little too focused on relieving themselves, ignoring or being oblivious to their real surroundings.
Brush bites can be from anything, they can be poisonous, they can bleed and swell, they can also be a gourmet invitation for every biting fly known to mankind.
As soon as I see that there is going to be biting brush on a terrain I will remind people of the importance of not letting vegetation touch them. Falling or getting scraped up from the terrain in an area where there are flies can make for a miserable existence when the trail is going slow.
Your basic first aid will be extremely helpful for brush bites, look to see if anything has punctured or entered the skin and remove it, washing the area, covering it from further exposure. If there’s no cover available for the scrape then a topical ointment with petroleum base may be your only bandage (Neosporin, Vaseline).
Continue to check brush bites for swelling and itching. That will let you know if you’re going to need to use some Benadryl.
If itching is going to make that athlete crazy you will want to give them a tool to divert their thoughts away from the itching. A simple mind tool where they focus on something else will help make the itch go away.
So far I have seen no one who has thrown their time or had to quit from a brush bite but it sure has annoyed them.