What happens if a dog’s hematoma is left untreated?

If a dog’s hematoma isn’t treated in time, it may keep spreading to other tissues, or after rupturing become infected by outside bacteria or viruses, causing local tissue inflammation and necrosis.

So if a localized hematoma appears, take the dog to a vet promptly to control the condition early and avoid possible complications.

Usually a hematoma is treated by draining the fluid, applying local pressure, or surgically opening and draining it then suturing. Later, focus on anti-inflammatory and infection-control care.