Lumps

When we first got Tommi he had lots of little lumps all over him, they stood out because he didnt have his winter coat we got the vet out as no-one on the farm had a clue what they were and he said he has had an allergy to something we was giving him, but we hadnt changed anything what he was eating, so we left them and he still has them, they have like little white heads :S
Does anybody elses horse's get these ?

Fleas? Did he move far? Even from one farm to a neighbouring farm there could be new plants and weeds on the property or in his hay. Hmmm

It could be casued by any number of things really.
Plants, seeds, bedding, hay etc.

Just make sure that any reaction he has isnt affecting his breathing, and a good wash in a medicated shampoo (like quit-itch) will help with any discomfort.

Finally try to locate whats causing it. If its somethng that can be removed then do so. If not restrict his access to it.

Hope that helps

My gelding had lil bumps on his chest and his belly, the vet said he gets allergic reaction to bug bites and to make sure I put the bug spray on and in the winter it should clear up(which it did)and I'll be on top of it in the spring.

The first thing that I thought of was rain rot. But, my mare gets huge hives as an allergic reaction