My SWB has a chronic itchy butt and, before I bought him, he had some sores that were never diagnosed but may have been related to allergies. Previous owners didn't spring for an allergy test and, when I had my prepurchase, my vet didn't think it was necessary at the time but we could always perform one later.
I've been putting baby oil under his tail and on his rear every day as was recommended to me to relieve the itching and he's also on Omega Horse Shine and "White as Snow" skin supplements and, until recently, was doing really well!
The other day I came out and his butt hole was swollen and ouchie and looked almost blistered. I had several eyes look at him and the general consensus was to give it a day and see if he got better before calling out the vet.
The next day almost all the swelling was gone and he looked much better. It's now been about four days and the swelling seems to be much better but he's got really painful looking sores.
What can/should I put on that to make him feel better? He's a very sweet horse and lets me touch the area and apply cream and baby oil without issues but I'm not sure what I should be putting on there that won't irritate it further.
Attached a photo of the area and of his pretty face for reading through this and staring at his butt