My horse has hard lumps all over the under part of his belly

college girl

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I went down to see my horse one morning and discovered that multiple hard lumps had appeared over night and were covering nearly all his under belly. I went down to check on him later on and the larger lumps had grown a bit (not a lot but enough for me to notice). I kept him in that night and the following morning more smaller lumps had appeared on his chest and lower part of his shoulder and the smaller lumps from the day before were bigger. I have looked up heat bumps but nothing relates as heat bumps normally occur around the horses back and where the saddle goes. He does react to the odd fly bite but the swellings are normally softer and less prominent. His mother gets protein bumps but he has been on hard feed since June/July last year and have never had any problems. There are a lot of nettles in his field and look tall enough to reach his belly but I’ve looked at images on google of horses allergic reactions to nettles and the lumps appeared much smaller. He now has a fly rug on with a belly cover until I figure out what’s going on. They have gone down since but I’d rather not have another flare up. If I can post photos below I will. Im at a loss as to what these are please help!

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Ruby's Mum

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i would susoect hives, in that an allergic reaction to something, one of my minis has had these, we never found that cause of it in the paddock but they went down after giving him antihistamines (peritonitis). I have also had one of my minis who rolled in an ants nest and had similar lumps just one side near his shoulder and girth line, he still had a couple of ants on him and when we went to investigate his paddock, found a squashed ants nest where he had rolled.
 

college girl

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Thank you! I’ll check his field cos he does lay down a lot. Also the lumps didn’t bother him, they didn’t seem itchy or tender to touch.
 
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Goldenstar

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Looks Just like H yesterday in his case in I know they are midge bites.
They don’t look like hives to me
 

Ruby's Mum

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OP how many lumps are there? I can't see photos that well on my iPad. My wee chap that had hives (diagnosed by vet as he was there doing vaccinations) had just a few largish lumps and he advised hives doesn't always show as multiple small lumps all over, just seen my previous post- silly autopredict has put "peritonitis" instead of piriton!).
 

college girl

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I would say he had about 10-15 larger lumps and several smaller ones between them. The area most affected was along his girth line. But the larger lumps were more towards the outside of his belly and the smaller lumps around the middle.
 

college girl

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Thanks. I’ve sprayed a ton of deet on him especially on his belly and taken his fly rug off cos he hadn’t worn one all last summer and everything was fine. So fingers crossed he’ll still be ok tomorrow morning.
 
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