I have a warmblood gelding whom I recently moved from a large boarding facility with dirt paddocks to a smaller facility with grass turnout. Since moving him, I’ve noticed that he has these strange scabs/bumps on the underside of his jaw (in the V right in front of where the throat latch on the bridle rests). No tack sits there (his fly mask goes across the area but doesn’t touch it), so I’ve ruled out a tack rub. The area seems really itchy but not sore, as he lets me clean it and apply anti-itch cream with no problem.
Could these weird bumps be fly bites? If so, does anyone have any recommendations for preventing or treating them?