653439:
A friend has a horse that gets "sweet itch" in the summer. Sounds similar and is causd by an allergic reaction to bugs (I think?). You can get a flysheet for protection.
Sweet Itch is an allergic reaction to the bites of Midge Flies. My Arab is horribly allergic to Midge Flies, tick bites, you name it.
Yes, zinc oxide works really well, but during fly season be prepared to be an outpatient nurse to your gray horse on a daily basis
Every morning, before turnout, part of my battle against the bugs regimen is to take a 50-50 mix of diaper rash cream and hemmerhoid cream and run a line of it down my Arab's tummy line -------clear back and covering his belly button and the outer edges of his sheath.
WalMart's brand of diaper rash cream has the same 10% zinc oxide as Desitin does. Their brand of hemmerhoid cream is half the price of Prep H as well
I have read on more than one forum that sometimes horses that are extremely allergic to bug bites are lacking in Magnesium. I have a horse with Equine Metabolic Syndrome who is on 99% pure magnesium to help control his cresty neck.
Magnesium is water soluble, which means the horse's system will dump what it doesn't need, so I started the Arab on it two weeks ago. He seems to have improved by about 50%, which is a lot considering if a bug even flies near him he breaks out
You can also use the diaper rash cream on your horse's nose to help prevent sunburn.
This year I also quit using chemical fly sprays, because anything that works burns -- especially in the private areas.
I have been using a 50-50 mix of Apple Cider Vinegar (ACV) and water. I hand wipe all four of my horses, starting with their ears and faces first. I fold a paper towel twice and use a clean one for each horse.
I have to refill the spray bottle before I start the fourth horse, because he drinks about one fourth of the bottle. He sticks his tongue out and I spray - lol lol Apple Cider vinegar is not a bad thing for a horse to drink --- just have to watch not giving them too much if they like it, so they don't get the runny bums.
Anyway, I have noticed five things by soaking The Boys with ACV/water:
1. The little flea and no-see-um bites in their ears are gone.
2. They don't seem to get near as bad cases of scratches as they did before.
3. The ACV/water seems to really help in keeping the ticks off them. I feed the Walkers garlic, but not the Arab because he had an ulcer incident three years ago, so I am pleased that the ACV/water is at least 90% efficient on him.
4. If I soak them REALLY GOOD from the knees down, it seems to deter the bot flies by a HUGE margin. I know bot flies don't land to lay their eggs, so the only thing I can think of is that the flies are not smelling or sensing livestock because they are soaked in vinegar - lol lol
5. Their coats are really soft and their muzzles seem to not be getting sunburned as bad as last summer (they are all dark-skinned on their noses).
The only thing I don't like is that my gorgeous Liver Chestnut is bleached out some and I blame that on the vinegar, but I'll take it because he is my EMS horse and at least isn't getting stressed out by fighting flies and whatever else.
I apologize that I got slightly off your question, but all the issues are related.