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My dog's eye lump gets red when excited. Is it high blood pressure?

Updated On September 23rd, 2025

Pet's info: Dog | Border Collie | Female | unspayed | 5 years old

My collie has a lump on the white of her eye, it is the offside and the side of the eye nearest the nose. It goes extremely red and inflamed looking when she's got to excited or heavily exercised. It goes down and improves with no exercise. I'm thinking could it be to do with high blood pressure as she is a very full on, never stays calm type of dog. She doesn't seemed to be bothered by it. No apparent pain or discomfort at all. the lump size doesnt change so it can't be cancer I hope.

1 Answer

Most Helpful Answer

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Answered By Lauren Jones VMD

Veterinarian

Published on April 23rd, 2017

I'm glad to hear that Fli does not seem bothered by the lesion on her eye. Your thinking is likely correct in that when Fli's blood pressure increases with excitement, blood rushes to the lump, causing it to become red. Possible causes of the lesion on the sclera (white of the eye) include a conjunctival cyst, benign or malignant mass, among others. Cancer, or malignant masses, seem less likely due to a slow rate of growth, but are certainly not impossible. I do recommend taking Fli to her vet in the next week for an exam to determine if further diagnostics or intervention are needed, or if continuing to monitor the lesion for changes is the best course of action.

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