looks like chicken poxs

[KINGLIAM]

i went to ride my horse yesterday got her out of field took rug off groomed her and tacked up went in manarge just did flat work for about 30mins took her back to yard un tacked and under the sadle flap is this funny rash it looks like small blisters its in a 6in mass also quite hot to touch and there is some larger lumps she was not sweating after work, she is quite fit she is riden every day i washed it down with hibi scrub today its no better so thave phoned vet have never seen anything like it before

 

[annaellie]

That sounds like the rash one of my mares had it turned out to be an allergy,

 

[henryhorn]

That's what ringworm sometimes starts off as..beware.

 

[Weezy]

Does it look like this?